pelliers

Hello, we have just recently moved back to the UK after living 2 years in an EU country. We were supposed to move back to our own house but the tenant couldnt leave so we are staying in our friends house in the mean time. But hoping to move back our house within a month or so. Our address on the HMRC system is still our EU address which is our house as well, not occupied by anyone else. I am staring a new job next week. So i was wondering what to do our address info on the HMRC system? 1- Keeping as it is until we move back to our own house? Any issue to start working in the UK with an EU address on the HMRC? 2- Changing our address to our friends address? where we would be staying literaly 3-4 weeks only? 3 - Changing our address to our own house? we have a re-direction order anyway, so we would be receiving letters in our friends address, also our tenant is nice, she would inform us when we receive letters. Thanks.