Thanks for your question and for asking for me.
I would not get the limited company involved at all with the renting of this property - as this will then lead to the need for business rates to be charged on the element of the property that is for business - would then lead to a benefit arising (so the need to meet more HMRC requirements with P11d expenses and benefits returns)
But if you have a room set aside then can be identified as purely arising due to the running of the company - then you can claim that throygh the accounts (and make good that amount - just be mindful of the P11db and P11d position)
Plus you may have issues with the renting of such a property from the landlord - who doesnt ant that address at risk of having a compnay trade from it.
But install a separate phone line for telephone and internet for the business etc so these are separated from your personal costs.
I would pay the rent yourself, and as an employee (director) of the company then claim a cost for the use of working from home, through your own self assessment as an expense to reduce your own tax position (and other associated costs such as phone/internet/lighting/heating etc