Calling all you Interiors Gurus: solve my curtain crisis!

[scampadoodle]

I am ordering new curtains for our living room. They will cost a bloody fortune so need to get it right. I am hopeless though so need your help.
This is what you need to know:

• Square bay window (4m track!)
• Draughty (drafty?) window with radiator underneath.
• Previous curtains spent winter evenings tucked up over & behind radiator, otherwise warmth disappeared through windows.

So: do I get curtains made with 2m drop to sit below sill but above radiator (which I think could look naff) OR
get them with 2.66m drop to floor & continue to tuck them behind the rad on cold nights? (which will also look rubbish but it's not all the time or even all year.)

I know I can rely on you....

amazonian Ok, so I'm exaggerating about the double storey extension but honestly, this bloke did masses of work in her garden - hours & hours - & only charged her £25. And she was aghast at what I paid to have the living room painted as she had hers done for £200 (all the cupboards & doors & everything).

totallyrandom yes that sounds very similar to our room. We are inner London so lots of the companies are based further out than we are anyway. I've contacted a few to see if they can renovate the windows (no doubt cue anecdotes from my mother about the cost...)