I haven't checked if this offer is also online, or in-store only (actually looking at their website, I don't think they actually allow online orders?). The offer started today, I believe, but be warned, it finishes on the 18th!
Covent Garden are good quality fresh soups in the refrigerated isle, not cheapo tinned stuff, and these normally sell for around £1.50 a time. The cheapest I've ever seen Covent Garden soups is about £1 on offer. It looks like PLUM Tomato & Basil is a new variety for them, as it said they were labeled "new" on the display description. So it's an introductory price, I think.
Only a 5 day offer! Get 'em while they're cheap!