Newly wed to a brit, basic questions

Our background, in case it is relevant: I am a Canadian/American/British citizen who has lived in the UK for the last 7 years. Recently I got married to my (solely British and never has lived abroad) husband. We have no intention of living outside the UK in the future. I have been filing tax returns annually since moving abroad, though I earn a low wage and file the foreign income exemption.

Question: what of my husband's finances needs to go on my tax return?

I will either be in low paying jobs or earning no money at all in the forseeable future. My husband earns £32000 a year but is early career and this figure will improve, possibly a lot. He has substantial savings. We plan to have joint bank accounts and buy a house. We both have small pensions, his will grow (mine will not as I plan to stop working).

Can someone explain how being married changes how I file? I find it all rather confusing. Thank you!!

File "Married Filing Separately" and leave his income out of the picture all together.  However, you will need to file the FBAR if the aggregate value of all foreign financial accounts exceeds $10,000 at any time during the calendar year.  This includes your own personal bank accounts and any account where you have signature authority. 

I am not sure of the implications of buying a house.

Thank you for your reply. Good to know I can leave out his income.

I suppose it is just our assets that I will need to report (ridiculous as it is to report your financial situation to a country you no longer have anything to do with!)

It would be best to keep your name off any of his bank accounts if possible. Any time you have signature authority over a foreign bank account, it will need to be reported. So keep your assets separate to the extent that you can.