Taking over from the Letting Agent

Tenancy Types and Management

Afternoon all! New member here but I imagine my questions aren't new so apologies if there is a permanent thread on this I've missed.

My rental property is let through an agent, rent collection only - I handle all maintenance. After 4 years of this and having had the same tenants throughout, I've decided to take over completely. I checked the terms with the agent, and I've given them the required amount of notice. The current tenancy will end in early December at which point I'll take over full management.

Obviously I've seen some of the resources on here with regard to starting fresh (https://www.nrla.org.uk/resources/starting-your-tenancy-checklist) however as I'm changing over with tenants inside (who I intend to keep) I wanted to check some things from the experienced members here.

1. When the tenants were first taken on, they were required to provide a guarantor to the agent which they did. I'll be receiving the guarantors details along with all other relevant documents from the agent - whats the process and/or requirements for contact with the guarantor?
2. I'm intending to use the TA template from NRLA as well as the privacy notice - I've completed signup to the ICO - should I send them a copy of the TA and state specifically it is to start from the end date of the current tenancy so there is no overlap? I'll be increasing the rent with the new tenancy but happy for the current one to finish when intended.
3. With regard to rent protection, legal protection etc. I currently have these through the agent, which I'll lose after we break terms. I expect this can all be covered through landlord insurance? I should have this but I never switched the insurance when I started renting it (it was my former home and had an existing policy). The current provider doesn't offer landlord's insurance so I'll have to cancel and be going for a policy with my motor provider, hopefully getting a discount in the process - are there any issues (potentially) with getting that policy in place right now mid-tenancy?

Thanks in advance for your help!

-Q