Not strictly true... Whereas it's undeniable that there are NHS physio's who don't understand/appreciate a patient's rehab goals, there are physio's working within the Leeds NHS hospitals who will aim to rehab to a patient's desired level. If this means bouldering/climbing, that's no reason not to rehab to bouldering/climbing. For example, there's a lower-limb gym based @ St James' which receives many of it's referrals from the orthopaedic teams based at Leeds General Infirmary. These patients frequently require (and receive!) many months of rehab, sometimes more frequently than once a week, and all free.... This includes rehab up to competitive contact sports.
People are very quick to criticise the NHS, and of course, it's far from perfect. But it also does some pretty good stuff too. The cost of private physio for rehab'ing back from a fractured femur wouldn't be insubstantial.
As an aside, you could theoretically get the same physio @ a private clinic who would've seen you @ an NHS hospital...
To the OP, I apologise for the slight sidetrack this has taken. On discharge, you should have a referral to an NHS physio (if not, why not?). There are knowledgeable and capable NHS physio's working in Leeds area- I'd give it a chance!
All the best with your recovery.