This is quite an unusual and long question, so not sure if any one can help!
My Husband & I lived in the Algarve and got our residencia and NI number etc. We had to return to the UK to look after a sick relative so had to give up the rental that we were living in. We have just returned to Portugal and are renting a house until we find somewhere to buy. Is it best to change the address on our documents now, or wait until we have found our new home?