Going back to this , it may be worth pointing out the following , what a person ( not necessarily the OP. ) or tenant is paying for once that enter into an Assured Shorthold Tenancy ( AST ) as there seems to be some confusion amongst tenants and sometimes it seems an 'entitlement' mentality endures.
The tenancy does not mean one can alter the material fabric of the property without the consent of the Landlord. The tenancy means you are RENTING the hire of the living space , as is , under the terms of the agreement at the time of signing the agreement.
In the same way one doesn't book into a Travelodge, Premier Inn and start redecorating because you are now unhappy with the colour / decor of the room , the same holds true of rented property.
Although many of the Landlords I have dealt with are happy to consider whims and desires of tenants ( even more so with proven longer term tenants ) to possibly change the colour of the room , curtains , add another power point there is no RIGHT for a tenant to make these changes without the consent of the Landlord.
Once you've had to ( copiously ) re-paint over a few walls some tenant has decided ( without consent ) would look better repainted in flat matt black...... you may also feel the same over what is afterall your property.
Just saying..... Tenant / Landlord relationship is a Two way street of responsibility and respect over property. Demonstrate that your a good respectful tenant and don't be surprised if you get the Landlord actively reinvesting and 'upping' the general standard of the property and courting you to stay longer. I know I do.