Should I renew my professional body membership??

It's that time of year again.. subscription demand and practice certificate renewal landing in the in-box.

I qualified in 1997.  I'm 50 next year.  Now working more or less full time for one client, with two smaller (very small) clients - one a sole trader and one a limited company.  All of my work (accounting & something completely unrelated) I do through my own limited company.  The main client is really just book-keeping - he uses an external accountant to do the final accounts and tax comps.

Should I give up on my registration?  I know I worked hard for it, but "at my age" (!!), thinking that the career is now on a decline.   I can save a chunk of £'s by not renewing for 2012.

Any comments/advice/pitfalls?

Thanks.