If I spend less than 90 days of the 2014/2015 tax year in the UK (which I will moving back on the 26th March) surely I'm still classed as a non-resident for this year though.

Agree with Anson.

We have a house in the UK which we rent out and its below the Threshold so don't pay tax.

Also if flights originate outside the UK and finish outside the UK they are not classed in your 90 days etc, just read that on HRMC.

If you spend more than 90 days in the UK, regardless of work or leisure, then you're classed as resident and the full proportion of your income is taxable. Because your property earns less than the personal tax limit, you're not liable to tax, regardless of whether you're resident or not.

Maybe you should start a separate thread as this is starting to creep from the original thread. Will be happy to explain in more detail when you do.

Agree Bymonek. Although actually for some people the limit drops to 45 days if they have strong links to the UK such as kids, wife etc resident there.