Any leased property where the Council are the freeholders they have a duty to repair the following:
1) The structure excluding plasterwork,but they would be responsible for any common areas.
2) Windows but not doors only communal doors
3) Installations but only the ones that are exterior to the property i.e gutters,downpipes,drainage etc.
4) The roof if it is a top floor property.
5) External Decorations.
Depending on the type of lease your friend has some have variations which include items outside the scope of a standard lease.As for a stage 1 complaint I personally don't think it would have any effect.
The real evil is not the payment of money, but the secrecy attending it (Chitty L.J. in the case of Shipway v Broadwood  1 QB 369, 373). .
The courts shall not make an enforcement order under section 65(1) if section 61(1)(a) (signing of agreements) was not complied with unless a document (whether or not in the prescribed form and complying with regulations under section 60(1)) itself containing all the prescribed terms of the agreement was signed by the debtor or hirer (whether or not in the prescribed manner
Moneylending transactions as a class give rise to significant social problems.
Astalavista baby and I'll be back