Well, did some digging and found that branded Verbatim DVD+R DL 8x in 25's are code 43757 and 50's are code 43758.
Looked at suppliers for the 50 pack, got fed up after half an hour as I only found these stores under the Â£50 mark. All have VAT + Delivery included:
Amazon do them for Â£44.99 with free delivery.
Carouselmedia.com do them for Â£46.80 sent 1st class post.
it247.com do them for Â£47.24 with 3 Day delivery.
valuemedia.co.uk do them for Â£48.58 with 2-5 day delivery.
321burn.com do them for Â£48.74 inc 99p for 10 working delivery.
So it looks like Amazon then.