Most landlords need to apply for an eviction order from court before they can ask bailiffs to evict you.
Sometimes landlords need to prove a reason for the eviction in court.
landlords won’t need to prove a reason for the eviction if they use the section 21 process but they must still apply to court.
With most other evictions, landlords must provide a legal reason for eviction.
If you [sic: as a landlord] have a lodger or other excluded occupier, you can evict without a court order once the contract or reasonable notice has ended. Landlords do not need to give a reason in these circumstances.