Regarding the second part of your question, I’m not an accountant so it’s always best to seek professional assistance on these matters. Typically you would invoice your Limited company for the usage of your home as an office.
Can I just confirm that these links apply to limited companies as well - they seem to be talking about self-employed people?
Regarding the invoice, I can certainly do that. However, would I still need to create a purchase invoice in QF? Can I not just create a purchase invoice in QF for the charge?
Could you also recommend what category (account) should I be using for this charge?