Yep, BB, I think you're a bit off there mate. As Leezyjet says, the average Captain is probably in their forties.
33 is definitely not too late. If you're Captain material they'll promote you as soon as you have the necessary hours regardless of whether you started your Aviation career late. Say you have the necessary hours by the time you're 40, I can't see why they'd hesitate to put you in the left-hand seat.
The only caveat is that you will find it hard to get into the lefthand seat at BA or maybe Virgin because promotion in larger Airlines is based on seniority, which you'll be lacking.
Good luck.
