Anyone driving from London to Madrid with room for a keyboard?

Hello,
I'm an English guy living in Madrid who misses his keyboard in London and isn't sure how to get it here... If anyone is planning to drive from London to here and reckons they could fit it in, i would be enormously grateful and of course reimburse you whatever cost you thought was fair.... The keyboard is a bit bulky, but fits flat across the back seats...
Thanks a lot

If anyone has successfully moved a keyboard here, do you have any recommendations re removal companies etc?