The damp bit could get messy/expensive/time consuming, the electrical side looks minor and something you could improve over time i.e. when you redecorate, etc.
RE the electrical side and DIY aside from a few areas where you need it done professionally (30amp spurs?) afaik the only reason you'd want a professional to do it or sign off on it is due to personal liability issues rather than it being illegal i.e. if you re-wire something incorrectly and its not signed off by a professional and someone dies because of it you can potentially end up in jail.
RE the electrical side and DIY aside from a few areas where you need it done professionally (30amp spurs?) afaik the only reason you'd want a professional to do it or sign off on it is due to personal liability issues rather than it being illegal i.e. if you re-wire something incorrectly and its not signed off by a professional and someone dies because of it you can potentially end up in jail.
Last edited: