Deducting Cleaning Costs from Deposit

[Lawcruncher]

The tenancy terms in the tenancy agreement?

Just to clarify, what I meant was that the requirement comes from the tenancy terms if they include it.

[Piffy]

I now believe that one of the tenants had Covid just before vacating and was in a period of Self Isolation, perhaps this is why the Agents suggest a "Deep Clean" to protect the next tenant. It would also explain why when the next tenant was due to move in, our Letting Agent put the tenancy start date back 2 weeks. (which obviously meant we lost 2 weeks rent)