Also in the UK, you will likely have an "inspection" on your rental every 3 months or so. It's fun!
Which you don't have to agree to because in England, every tenant has the right to "quiet enjoyment" of their home. However it does mean that you can't complain if they haven't fixed their repairs if they are not allowed to see what you have told them need to be repaired. The inspection is for the landlord or their agent to check for what repairs they need to do, not to see how you live.
As England also has no fault Section 21 "notice to quit", when your fixed term ends, you might find the landlord issues that, but they will have to pay the letting agent to find another tenant.
Even if you agree to a mutual convenient time for them to look for their repairs, they are not allowed to ask to inspect the property too often as that is considered to be "harassment".
You could ask the landlord if he/she minds you decorating, but make sure you get their acceptance of that in writing.