The top one is aqualegia (spelling?) also known as granny's bonnet. They tend to seed all over the place and can rather take over. Sorry not sure about the other two pics :)

Top one is aquilegia

Middle one - I don't like the look of it - I think it's a tree seedling, like the pic below.

The bottom one is too blurry to make out, but my best guess is a willow seedling (trees can be weeds too!)

Thanks again for your comments. Beattie, apologies for the blurry picture, it is actully part of the same plant as the middle one, i had attempted to do a close up!! Thanks again

Thanks for clarifying that Km - if they're the same plant, that explains why I thought they looked the same! :-)
My money's on a willow seedling.

Have you seen the question from someone who'd been growing what they thought was an apple tree from a pip, but it's a goat willow?
http://www.growsonyou.com/question/show/43100

And there's another question from someone else plagued by tons of fluffy seeds getting everywhere. Guess what the seeds are from - yup! probably a goat willow!
http://www.growsonyou.com/question/show/43184

My advice would be to get it out as soon as possible, before the roots get too big and tenacious.

My whole day today has so far been devoted to getting them out as they are all over my garden!! They are quickly becoming my nemesis!!

A quick rule of thumb is that it it's a plant you've got an awful lot of, it is quite likely a weed!
Some wild flowers are on the borderline between "weed" and "wanted" - they get heaved out if I've got something better to put in.