Podcast Summary

Episode Overview

Podcast: James Reed: All About Business
Episode: 66 – From Miniskirts to Stem Cell Therapy: How a Fashion Leader is Changing Heart Failure Treatment
Guest: Jennifer Rosenberg OBE
Host: James Reed CBE
Date: February 16, 2026

This episode features the inspiring and multifaceted career of Jennifer Rosenberg, OBE. Beginning as a post-room employee at Marks & Spencer (M&S) in the 1960s, Jennifer rose to lead innovation in fashion, founded J&J Fashions (then the UK’s largest ladieswear manufacturer), and, following her husband’s battle with heart disease, established the Heart Cells Foundation to advance stem cell research for heart failure treatment. James and Jennifer discuss reinvention, the power of innovation, and using hardship to fuel meaningful change.

Key Discussion Points & Insights

Early Career at Marks & Spencer: Innovation and Quality

• Climbing the Ladder: Jennifer started in the post room at M&S and soon moved through departments, learning the business from the ground up. (01:55)
• Fashion Innovation: She and her team were responsible for introducing the miniskirt to M&S, inspired by Mary Quant and the changing London fashion scene. Despite initial skepticism from a traditional, male senior board, Jennifer’s advocacy led to a trial that rapidly sold out.
  • “I said to them, we have to try this look. This is what's happening on the high street.” – Jennifer (02:51)
• Upholding Standards: Jennifer highlights M&S’s unwavering commitment to quality, both in sourcing and factory conditions, well before such practices became industry standard.
  • “Quality was terribly important. Quality, Quality. All the factories that manufacture for M&S had to be of a certain standard.” – Jennifer (07:12)
• Communication Culture: The environment fostered engagement at every level. Board members would directly talk to staff and shop assistants to stay close to customer needs.
  • “The sales assistant would know more than anybody else what the customer wants.” – Jennifer (12:45)
• The Value of Talking: Jennifer laments the modern loss of face-to-face communication, stressing the importance of “it pays to talk.” (14:22)
  • “I always say to myself, it pays to talk…so important to pick up the phone and have a conversation.” – Jennifer (14:44)

Entrepreneurship: Founding and Growing J&J Fashions

• Launching J&J Fashions (1974): Left M&S on good terms to become a supplier, leveraging her inside knowledge of M&S’s culture and standards.
  • “I left on very good terms. In fact, they gave me a golden handshake…” – Jennifer (16:42)
• Resilience in Early Challenges: Opened during Britain’s three-day week, improvising by sharing a generator with her husband’s nearby factory. (17:03)
• Trailblazing Trends: Jennifer continued to innovate, manufacturing flared trousers and later introducing leggings for M&S, taking inspiration from American commercial fashion trends.
  • “We innovated…and I was very good at innovating, as was my husband.” – Jennifer (26:12)
• Scaling the Business: Expanded to 12 factories and employed over 3,000 people at the peak, focusing on all ladieswear except knitwear and coats.
• Exit and Acquisition: Sold the business in 1992. The buyer, Claremont, failed after cutting the design department she had fostered.
  • “If you don't invest in design, you're in trouble.” – Jennifer (25:23)
• Globalization: Shifted to overseas manufacturing in response to rising UK costs and changing market dynamics, ultimately seeing the writing on the wall and selling at the right moment.

Reinvention: Founding the Heart Cells Foundation

• Personal Catalyst: Husband Ian’s diagnosis with heart failure and limited treatment options led them to experimental stem cell therapy in Germany, which restored Ian’s ability to walk up stairs in days. (33:53)
• From Patient to Pioneer: Realizing the UK lagged in stem cell research, Jennifer and Ian set up the Heart Cells Foundation in 2003 to fund clinical trials.
• Direct Impact: The foundation formed a unique partnership with St Bartholomew’s Hospital, funding technician positions and patient treatments directly.
  • “We are only paying for what they are treating. We pay for the technician…It’s working brilliantly.” – Jennifer (35:15)
• Breakthrough Clinical Trials: Funded gold standard trials for heart attack survivors, post-attack heart failure patients, and those with idiopathic cardiomyopathy.
  • “The results are unbelievable.” – Jennifer (36:54)
• Expanding Access: Now seeking to raise £8–10 million for a major national trial, aiming for NHS-wide adoption. (38:04)
• Cost and Benefit: Each stem cell procedure costs approx. £12,000, a fraction of the cost and complexity of heart transplants, with the added benefit of significantly improving patient quality of life and returns to work.
  • “Heart failure is one of the biggest killers in this country…it affects the whole family…and the economics of the country.” – Jennifer (48:16)

Lessons in Business & Philanthropy

• Skill Transfer: Approached charity leadership with the same organizational rigor as business—regular meetings, financial discipline, communication, and energy.
• Communication is Key: Jennifer ties all her successes—across industries and decades—to communication and relentless energy.
  • “I think, if you have to ask me, the one thing young people really should try and…learn today, is how to communicate with people.” – Jennifer (44:00)
• Measurement of Success: Value is measured by both the lives changed (families helped) and the financial stability/enabling power of the charity.
• Innovation and Fearlessness: Advocates learning by doing and taking risks, especially when young.
  • “When I look back…I didn't have any fear…anything I wanted to do, I was able to do.” – Jennifer (50:13)
• Never Retire: Jennifer’s unflagging energy is both a personal habit (daily exercise and engagement) and a philosophy: always have something to aim for.
  • “No, I never want to retire…I love having a list of jobs to do that I can cross off at the end of the day.” – Jennifer (47:05)
• Buccaneering Spirit: Both Jennifer and the senior M&S leaders she learned from embodied a fearless, problem-solving approach.

Memorable Quotes & Notable Moments

On Introducing the Miniskirt at M&S:
“This amazing designer called Mary Quant and this wonderful model called Twiggy was walking around London in these miniskirts. And I felt, well, we've got to have this. We've absolute. So I bought one for myself… I made a presentation to the board… and they just walked off the counter within a day.’’
– Jennifer (02:51–04:27)

On Quality and Standards:
“All the factories that manufacture for M&S had to be of a certain standard. They couldn’t be like sweatshops…M&S insisted on having the right facilities for their staff.”
– Jennifer (07:12)

On Communication:
“It pays to talk. …So important to pick up the phone and have a conversation, rather than keep sending texts, boxes and emails.”
– Jennifer (14:44)

On Innovating in Fashion:
“I have a very good eye for seeing what's going to sell…We would go to America… Their stores were wonderful. We copied.”
– Jennifer (26:39)

On the Power of Design:
“Design is a very expensive part of a business…they cut the design element down…If you haven’t got new merchandise coming through, you suffer.”
– Jennifer (23:49–24:27)

On Setting Up the Heart Cells Foundation:
“My husband was so incensed… there was no money in the UK going for this research…He said, ‘How much do you need to start this trial?’…Ian said, ‘I’ll get it for you.’ And he did.”
– Jennifer (34:16–35:00)

On Energy and Never Retiring:
“I've got a lot of energy. …I just…I like doing things. I like having something to aim for. I love having a list of jobs to do that I can cross off at the end of the day.”
– Jennifer (47:05)

Timestamps for Key Segments

• 00:00–07:10 – Jennifer’s early years and introducing the miniskirt at M&S
• 07:10–14:50 – The qualities that made M&S an industry leader; workplace culture then vs. today
• 14:50–22:33 – Career progression, the importance of communication, and transitioning to entrepreneurship
• 22:33–29:10 – Scaling J&J Fashions, innovation, acquiring and integrating other companies, and eventual sale
• 29:10–41:09 – Personal catalyst for Heart Cells Foundation, stem cell science, setting up the charity, and partnership with Bart’s
• 41:09–45:28 – Starting a charity from scratch, communication, and the emotional impact on families
• 45:28–48:58 – Measuring charity success, stem cell therapy’s expanding promise, and future plans
• 48:58–53:36 – Personal routines, energy, advice on reinventing oneself, maintaining standards, and future outlook

Key Takeaways

• Reinvention is Possible: Jennifer’s story embodies radical reinvention—carrying forward lessons, skills, and energy from one field to the next.
• Innovation and Design Matter: Whether in business or social impact, innovation, attention to trends, and design are enduring differentiators.
• Communication is Essential: Both success in business and effective philanthropy hinge on clear, personal, and continual communication.
• Be Fearless and Resourceful: Early-career boldness and resourcefulness lay the groundwork for continual career evolution.
• Purpose Drives Persistence: Jennifer’s pursuit of purpose—whether modernizing fashion or saving lives—sustains her relentless energy and drive.

Closing Questions & Reflections

• What gets you up on Monday morning?
  “I always have early appointments deliberately because I’m not the best at getting up early. So if I have a 9 o’clock meeting, I have to be up for it…” – Jennifer (52:28)
• Where do you see yourself in five years?
  “I’d like to still be here… doing more of the things I enjoy…” – Jennifer (53:08)

Jennifer’s story is one of progress through innovation, resilience, empathy—and the buccaneering spirit she urges every entrepreneur and leader to cultivate.

To learn more about Jennifer’s work, visit theheartcellsfoundation.com.