Apologies if this opportunity has already been mentioned somewhere else.

On top of the Wine Flyer's Black Friday offer (for every £1 spent, you’ll collect 20 Avios), you can use the code TUBE at checkout to collect 4,000 additional Avios.

I opted to buy their Big Bold Red Favourites Selection (12 bottles for £150) and collected £150 x 20 Avios + 4,000 Avios = 7,000 Avios in total. That's about 46 Avios for every £1 spent. Not bad, I think !