You can make your own tenancy agreement but you need to make sure that it is up-to-date with the law and in particular does not contain illegal clauses. The Tenant Fees Act 2019 made certain tenancy payments illegal such as cleaning fees. Including one of these clauses in your tenancy agreement can lead to a £5,000 fine.
When creating your own tenancy agreement, it is also important to check:
To create your own tenancy agreement with Legislate, read our assured shorthold tenancy tutorial. Creating your own tenancy agreement with Legislate means that you don't need to worry about the terms being out-of-date or not having the other legal documents you'll need to generate during the tenancy.