I have the Wickes and it's the most basic machine but I just use it for wet with just the hose end for spills etc. If you intend to use it for both wet and dry and want or need better quality tools with a larger capacity I'd consider the other recommendations.
Big chrome titan from Screwfix. Wheels broke almost immediately. Love the thing. His name is R2D2
Funny story - I watched a young labourer sweep up a load of ground concrete. He then went to hoover it up. He put the hose into the wrong hole on the hoover. The other hole does not suck. You know what it does.
If you are going to get the titan from Screwfix be aware the lid/motor unit is not held on tightly so when carrying it with a ltr or two of fluid if you bump it the motor unit & can will seperate & the fluid will spill out.
When it has more fluid in it than that the weight holds it locked.
As mentioned above it sucks like a pro... and can usually recover the fluids spilled when carry it partially loaded apart from when the customer has white/light carpets.. apparently...
I still have mine despite a couple of spills in houses when carrying it & a few times when it tipped over in the van after a long day when i forgot to fully empty it out prior.
Also have a older Einhell wet vac which has none of the above issues of detachment of top motor unit from bottom can.