I am an ex-pat - Since leaving the UK in 2003, I have never received notice to complete a tax return (having moved several times and not informing the Revenue). I receive a small amount of income from a UK property and made a capital gain on a UK investment property several years ago. I would like to do the right thing and fill in a tax return but not if it means raking up
past tax liabilities (in particular the capital gain)

.
Does anyone know:
1. whether HMR&C would tend to move forward or investigate the past (can of worms I am sorry to say) if I make contact with them? and
2. how long does HMR&C keep records?
Any comments will be gratefully received.