I had a look at B&Q solid floors, but
1- the pieces are relatively short (between 300 & 900mm long for the one i was looking at)
2- i don't think their wooden floor are particularly well priced
3- i thought the quality is mediocre, e.gs looks plasticky even though their are solid wooden floors
Ended up buying solid oak in Brooks. Pieces between 300 and 1200mm
Typical box i got was made of 8 times (1200mm + 700mm + 350mm) * 125mm width. A box is 2.2sqm. I think it was €24 yd² (during their sales!)