650c wheels bicycle (for 5'3 and under)

I'm not ashamed to say I ride an Islabike Luath 700 small bike for cyclocross (bought secondhand for 200 quid from a club member's son who had grown out of it). And I've seen quite a few ridden by other women as well.

This is my bike now! Only just seen this post, even though I picked up the bike pre-Christmas...