Bike lights for sides of bike

[EckyH]

Is there a sticky strip that you can get to make the tyre wall reflective?

For tyres probably not, but for rims there are stickers:
https://luxshield.de/fahrrad-felgen-reflektoren-sticker-12er-set-flash-arrow/bk-uni-ra-12
https://luxshield.de/fahrrad-felgen-reflektoren-sticker-64er-set/bk-uni-rr-60

Don't know whether these are available in the UK, but hope so.

E.

PS: Please don't mind the gruesome pictures of "cyclists" on that page. Obviously they are generated by artificial incompetence.