Bodyline shoe sizing question?

[sweets-paradise.livejournal.com]

This is my first post here so I hope I'm doing it right! I've looked at the rules and it seems like people use a cut with "Cut for the uninterested" for questions so I hope this is the proper way to do it, it's just what I've observed.

I've tried searching and it seems as though the sizing varies from shoe-to-shoe so I thought I'd make a post about this.
Since some people have said that some shoes should be bought in a size a little larger than usual and others should be bought a little smaller and I haven't seen anything for this specific shoe. I apologise if there is and I've missed it.

I've fallen in love with these shoes on Bodyline. I think they are adorable, though I'm considering taking the bell off if I buy them.
Anyway, back to the point. I'm usually a UK size 5 or 6, depending on the shoe so I was thinking about getting a size 5 and a half.
Would this be a wise decision? And has anyone bought these shoes that can tell me if they are true to the sizes?

Any help is much appriciated, thank you!