Tenant Breach of Contract - Rent Arrears and Damage

I'm a landlord in England with a tenant who has fallen three months behind on rent and caused significant damage to the property beyond normal wear and tear. I've issued a Section 21 notice, but I want to understand my options for recovering the arrears and deposit deductions before pursuing eviction. The tenant is ignoring my requests for payment. I need clarity on my legal position and the best course of action, including whether I should pursue a money claim or focus on possession proceedings first. I'd like practical advice before instructing a solicitor for court action.