3G 2100 femtocell for O2 only, 2832 also popped up for me and is suspected to be a femtocell in another area of the store.
O2 boostbox before the deli counter in Tesco Stroud
No data connection for me when testing (despite showing HSPA on two devices, Pixel 6 Pro and Redmi Note 10 Pro). Also couldn't send a test message to myself.