I’d also recommend plusnet. Excellent customer services and if you find a better offer they will transfer you to it.
They are currently doing an offer for 3gb data and unlimited calls and texts for £6 a month
I have the splash art kit.
I'd recommend it.
Some photos I've taken with it:
Redsnapper have generally had good feedback on here:
They are an advertiser on here:
How does it work if you already have a monthly plan? E.g. do you need to cancel that first, or do you get a code if you buy this and just add to your account so that you don't get billed for the next 12 months?
The A7iii is in stock for £1,875 at amazon (only 4 in stock though):