Confirmation of when I can serve section 21 pls HMO in England

[scoobydo]

Tenancy in England 6 months AST, deposit protected with DPS prescribed info served etc etc.

Tenants have been a pain since day 1, when they moved in 16th October I got them to pay 2 months in advance (could not run normal checks as they are from overseas and also couldn't supply a guarantor)....

[scoobydo]

Best stat on the market for this is the landlord one from inspire home automation