Tomato Leaves Curling

[Frank97]

Good morning
Any idea what has happened to these Tomatoes?
http://i791.photobuck...97/D97x7/S1053442.jpg
http://i791.photobuck...97/D97x7/S1053443.jpg
http://i791.photobuck...97/D97x7/S1053444.jpg
They were purchased from a local garden centre at about the beginning of March as seedlings then potted up grown on in the greenhouse and then planted into a Tomorite grow-bag still in the green house, they are now outside as I've replaced them with some much healthier specimens. I don't think it's frost damage as they were inside and I can't
see any sign of insects on them, someone suggested spider mites could be the cause but I can't see any sign of them. They are now starting to flower and have a couple of small tomatoes forming but the leaf curling has persisted. Any Ideas?
The pictures were taken today BTW.

[Frank97]

Thanks Trimeresurus.
Looks like I'm in for a glut of Toms this year then.

[ssharon01]

This article will be helpful to you for growing healthy tomatoes.

http://bit.ly/fazLzB

[Frank97]

A good sugestion ssharon, but I could buy an awful lot of tomatoes for the price of a hydroponics set up not to mention the price of the nutrients. Don't ask me how I know that.:-)
I'll stick to grow-bags!
I just thought the twisting was wierd as I've not seen it before.