Can the landlord ask me to pay his legal costs upon the grant of a new lease?
This is very much a matter for negotiation. As far as the renewal of an existing lease is concerned, the Costs of Leases Act 1958 states that if you do not agree to pay your Landlord’s legal costs then that is the end of the matter. But if you have lost your statutory rights under the Landlord and Tenant Act 1954 Part 2 – e.g. by not responding to notices within the time limits, or by contracting out – your position may have been weakened.