Some of the replies on here are incredibly ignorant of obesity, diabetes and weight-loss injections.
GLP-1s don't just stop food cravings/reduce appetite etc.. We've had drugs that do that for decades and none of them are anything like as effective as GLP-1s. GLP-1s have a number of mechanisms of action. They help to regulate blood sugar and a whole host of other endocrine functions. For people with type-2 diabetes they're fantastic at normalising HbA1c (with or without co-existing overweight or obesity). For people with overweight or obesity this blood sugar regulation in turn helps them to lose weight. Mounjaro is especially effective because of its effect of GIP.
OP- well done on the weight loss.
Unfortunately your GP cannot prescribe Mounjaro even if they really wanted to as you don't currently fit the prescribing guidelines. You can ask for a referral to a tier-3 weight management service who may in turn be able to prescribe Mounjaro, another GLP-1 or offer alternatives such as weight-loss surgery.
The alternative is to continue to self-pay. Semaglutide (Wegovy/Ozempic) is cheaper than Mounjaro so perhaps investigate that with your private provider.
Your GP can also do social prescribing - such as reduced cost exercise classes/gym membership or membership of things like Weight Watchers. Those will help you to maintain your progress.
It IS a perverse outcome of the prescribing guidelines that people such as you aren't currently deemed unwell enough to benefit from drugs that we know are hugely effective and that will save the NHS huge amounts of money in the long run. That is, unfortunately, something that happens all too often within the NHS because short-term budgets trump long-term costs.
For all the people saying "stop eating shit". Do better; your ignorance is embarrassing.