If by the warm, you mean around 22º C, then I would put it there. Make sure that it gets plenty of light, or they will get too tall and fall over.

Thanks very much Tug, that's what I wasn't sure about, just how warm. I've put birch twigs amongst them as supports..

as Tug says next to plenty of light but away from any direct heat sources. do you have any growth showing? In the past I haven't brought them into the warm [from a cool dark coal house] until I have about 2" of growth].

Hi Sbg, yes half an inch of growth. I'd had them in my unheated greenhouse, and was bothered about the damp and rot.
Thank you they're on my kitchen windowsill now..

Just an.update, they're growing very well now, and I'm sure they're well.on their way..:)