They just gave me an ultimatum saying if I don’t sign the new renewal, they’ll issue me a section 13, form 4 and increase my rent by 25% for a rolling one.
Are you paying well under local market rate ? You could challenge a S13 through the ombudsman, but if the new rent is still under market rate the ombudsman may find in agents favor and even increase to local market rate. They are clearly trying to bully you into signing for a new fixed term.
I agree with the others let them serve a section 13 notice and challenge it
25% is too high
It should match inflation or a maximum of 5%
Last year it was higher but inflation hit double digits so that was acceptable
If you refuse to sign the new contract then your tenancy will just become periodic and the agent cant prevent that. You could challenge a s13 rent increase and if the amount is way above market rent you would probably win. However, the agent may just decide to serve you a s21 notice to begin eviction proceedings, so if youre hoping to stay at this property longer you will need to think carefully about your response.