Do i need printed or in app proof of covid jabs? - Your NHS App will provide proof of your C19 status.
My passport has more than 4 years to run. - Why wouldn't you already know this is OK
GB sticker on number plate. - Now a UK Sticker
Got to wear gloves. - True, but why wouldn't you
All bike documents. - is a must
Visa, no. - Depends where you are from - you haven't added your location
Type of breakdown cover or health ins, now we don`t have a Euro health card? - Find out if your insurance cover has breakdown cover - IIR you can still use your old Health card or just google a new one, why not they're free.
Will vodafone data still work without paying £££ per day? - look at your contract - how the hell would I know
I think the info around helmet sticker is misleading - French Legislation says motorcycle helmet must have stickers however the EU say this cannot apply retroactively to helmets already in use. some sites will have you believe you have to buy them.
UK Gov and French Gov websites are a good start or ask Kevin or Geoff