TESCO Extra Corstorphine had the 55" 4k Bravia model at £370.03 (Original Price 740.05).
The SONY TV Model is 55XD7005
Unfortunately, I was in the shop with the Mrs., so no-go. I did play sales-man to this rather pretty Asian lady, who picked it up immediately. The chaps who were mounting the display indicated that there were many pieces still left. However they were just flying off the display as we walked around picking groceries :( - Don't know if this is national.
I might just drop in at lunch and pick up one for myself, if stocks are still there.