Here is a question to the blog clinic from Alice (not her real name) who is a landlord
Tenant not paying rent, issued a notice to quit giving 4 weeks notice no response, guarantor also sent rent invoice no response from either, what can I do?
Follow the proper procedure.
Unless your tenancy is a common law one, a Notice to Quit is not the correct notice to use. You need to either use a section 21 notice, or a section 8 notice citing rent arrears.
Neither of these notices has a four week notice period. The section 21 notice period is not less than two months and the section 8 notice is (for serious rent arrears grounds) not less than two weeks.
Once the notice period has expired you will then have to issue court proceedings for possession.
So far as the guarantor is concerned, if he fails to pay you can bring a claim for a money judgment in the small claims court.
Note that I have a rent arrears action plan on my Landlord Law site which is specifically designed to help landlords with tenants in arrears of rent.