I'm 37yrs old, PPL and 120+hrs.....
I wouldn't touch it with a barge pole.
However, as the other have said, it depends on your situation. If I win the lottery or come into enough cash to leave me financially secure tomorrow, I'll go straight out and do it, just for the achievement.
But unless you're currently earning less than comparable amounts to an FO (in which case you're unlikely to be able to do it anyway), why spend many tens of thousands (if not 100k) of pounds for a job which will net you about 20k? IF, you can actually get a job.
You may be back in the same career, with a 100k debt, and nothing to show for it except a couple of hundred hours and an ME/IR which is quickly lapsing.
Really does depend on your dependants, social, financial, career situation etc.
But at this age, in this economy, and this market, you'd be mad. (imho).