Most florists that I have been to see have quoted between £30-£40 for bridesmaid, £6 for button holes £8.50 for corsage, £40 top table and church pedestal £60 each, check that the flowers you want are in season as if they are out of season they will cost a lot more.

Thats what I did, I printed off pictures of what I wanted and made appointments with loads of florists, the quotes I have range from £897 to £505, the £897 didn't include delivering the flowers and actually had less included that the £505. THe cheaper lady was lovely, I was sat with her for 2.5 hours, she taught me loads of different things about different flowers, told me what was and wasn't in season and made great suggestions as to what I should use. SHe understood everything that I liked and disliked and she was very honest about the fact that she too disliked all the things I dislike. Her flowers were nicer and fresher than the expensive people and she was doing more for me, just because someone is more expensive doesn't mean that they better so make sure you shop around.
One tip she did give me was, that in previous shops she has worked in if she has someone comes into her shop and they sound like they know what they are talking about they will generally get a better price because they would know if they are being charged more, so do your research before you go, sound like you know what you are talking about even if you don't and you might get a better price. x