Posted: Wed Aug 27, 2008 9:48 am-
Basically you just need to get a record of how much income tax you've paid in the UK, for example from HMRC, declare it on your T1 and claim a foreign tax credit for it as explained in the general guide for the T1.
Bear in mind the UK tax year runs from April to April, so you won't automatically get anything from HMRC.
If you're not working it's not a big deal because you pay no income tax in the UK and your tax home remains Canada, so you do everything the same as normal.
If you are working in the UK there is other paperwork you will need in the UK, NI number for the employer which you get from the dept. of work & pensions, plus you will need to file a P85 when you leave.
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Steve.