Wearing a nice watch in Soho, Liverpool Street, Tower Bridge is super sketchy and you're likely to get comments about how 'brave' (stupid) you are. These are just the places I've been to, West London is meant to be much worse.
Edit: Here are some links I found
- "Machete-ban petition launched as London watch robberies rise" https://www.bbc.co.uk/news/uk-england-london-64991862
- Statistics for stolen watches from 2018 to 2023 https://www.met.police.uk/foi-ai/metropolitan-police/disclos...