The Personal Tax Allowance is currently £11,000 per year & is due to increase to £11,500 in April 2017. Therefore the first £11k you earn in the current financial year is tax free and everything afterwards is taxable. I would imagine that with around 9 months of wages and pension, you would have already hit that limit.
However HMRC often assume you’ll be paid a similar amount for the whole year(wages & pension). So you might find that if you continue to pay the same amount of tax until 5th April, a small refund might be coming your way? If after the new tax year starts your income is below the PTA, you shouldn’t be paying any tax at all. But bear in mind that any wages, pension/s and state pension you have coming in will all count as income.
That’s how I understand it, but someone with personal experience might be along in due course.
Or you could always get in touch with HMRC and see what they have to say.