1. Alexander Fleming Laboratory, Paddington
2. Benjamin Franklin House, Westminster
3. Carlyle's House, Chelsea
4. Charles Dickens Museum, Holborn*
5. Dr Johnson's House, City*
6. Florence Nightingale Musem, Lambeth
7. Freud Museum. Hampstead*
8. Handel House, Mayfair*
9. Hogarth's House, Chiswick*
10. Keats House, Hamsptead*
11. Michael Faraday Museum, Mayfair
12. Wesley's Chapel, City Road*
We could also have Baden-Powell House, South Ken and further out Down House, Downe (Darwin) and Red House, Bexley Heath (Wm Morris). Sherlock Holmes (Baker Street) is a fictional character.
*Those I've been to.