We have one, and we use ours for:-
remove condensation from windows in a morning
removing water from shower doors after a shower
removing water from tiles around bath after a shower
removing water from bath, after a bath
cleaning house and car windows
picking up spills on any hard surface (floor, worktop etc)
great for cleaning windows and mirrors as it leaves them streak free

Is that round the corner from Mayfair?

Have only used ours twice in 6 months. It does it's job well but I can still see it ending up in the same cupboard as our toasted sandwich maker, food processor, slow cooker and Sodastream fizzy drinks maker.

Exactly! In my old victorian house for 3 months of the year this removes all the condensation in about 5 minutes for all the windows, compared to about 10 minutes faffing about with cloth and bucket (which is what I used to do). This saves me a minimum 90 x 5= 450 minutes = 7.5 hours to enjoy as leisure time. It also saves the paintwork which means no painting required for last 4 years which has now saved me an additional two weeks of labour. So if you have an old house with old windows it is a no brainer.

which store?

This particular one was in the Old Kent road store in London and it was on a narrow shelf which could only hold 2 at a time. It didn't say "reduced" and for a time as they normally do so i'm assuming its a price slash.

Is it the WV5 model? Thanks

WV2 model. i bought one for myself too

No, this is South East London...

Just check you local Tesco store, it should be the same if they have it in stock.

Got the premium one couple of weeks ago from Tesco for £12.25

What Tesco was that, pls?