Thanks for the replies.. guys..
Richard, have you ever seen a plasma light? The spectrum is pretty close to the sun, they're very very expensive though!
I guess I'd have to be very lucky to time the fruiting that well but that is most certainly something I am willing to try! This is England after all and I'd have to do something pretty funky to grow bananas here. I probably could have had a banana outdoors for 9 months this year, I'm waiting for the first frost of this winter still. It was frozen this time last year.
I don't know what it's like in the US but there's obviously not a lot of demand for edible bananas in Europe and so they seem to be pretty hard to come by and availability comes and goes. Most are out of stock everywhere. I need to build a short list and then keep an eye out for them.
I passed up on Rajapuri because I thought it was ornamental!
I know most plants in pots are generally smaller but wasn't too sure whether this applied to bananas since they don't even grow a stem, I wonder how much smaller they are?