Hobbycraft?
Black wood for large black and white photos.
I just looked at e-frame...£42 for a wide black wood frame and mount, thanks Dave.
I was worried about glass but it looks like they use acrylic?
Oh, I use a bespoke framers in Rye. Very cheap, excellent frames. Maybe not quite so good if you don't live nearby eh?
http://www.campionframes.co.uk/
Ikea? Buy one of the framed pictures and throw the picture away...
max-spielman go upto 24x16 photograph frames (A2) with everything below that too.
but yes, the Ribba range in IKEA go upto A1 even