You can get big reductions on the cost if you join one of the pharmacies which offer discounts for referrals - Voy or Med Express.
For example, when I joined Voy, I originally cancelled the first order due to the cost. Went back on a week or two later and as I had shared my friends referral code I had 3 referrals on there and a free pen. (they have stopped doing a free pen now but you can get 60% off for 3 referrals or 30% for two). I just tend to share it in the Promo codes section on this site or the thread for Referral codes - pm me if you would like my code for a referral to start with that would get you 35% off. (you could then cancel that after if it was too expensive then still use the referrals if needed, but I am unsure if they will cancel it if it has already been approved / dispatched
The other one which does this is Med Express- I'm not aware of any others but there are discounts here too www.monj.co.uk
With Med Express it's £40 off (I think, I'm not with them) and then it seems the referrals are accumulative, £40 off for a referral, again with a code.
I have heard of someone going on Tick tock or Insta and sharing their codes in there if you're into that sort of thing.
I suppose you could do something like look at e.g. Credit karma and put it on a credit card if you are wish as well. (not sure I should recommend that but I have used this in the past- you can swap to a zero percent card with a transfer as well to avoid interest.)
The final thing I could think of is www.oviva.co.uk This is a NHS tier 3 online service which may prescribe Wegovy if BMI is over 35 and possibly with other health conditions, could ask the GP about this. Hope some of this is helpful
Also, many seem to mention their shopping bill goes down anyway so that might be something to take into account.