Then I can advsie that
Gross salary from 06/04/2016 to 30/09/2016 will be £25368
Plus pay in lieu £12684
Plus taxable element of compensation £11116
Total income £49168
So without further employment the first £11,000 tax free - then the next £32000 at 20% = £6400 and the reminder at 40% (£6168 x 40%= £2467.20)
So annual tax would be £8867.20
But in 30/09/2016 you will pay 40% of the pay in lieu and the taxable element of the compensation - so 40% x £9520 so if you go onto further employment just hand your P45 and each payday will see a refund back to you but as you are to be paid in lieu then it will not be until 31/12/2016 ( when that 3 month period is complete) that if you still have no work that you can claim any benefits (and then the Job centre will refund overpaid tax (for Sept Oct Nov and Dec) to you
And if you do not claim benefits and have no work 4 weeks after 3112/2016 then claim a part tax refund from HMRC on form P50 - link here for that form https://www.gov.uk/government/publications/income-tax-claiming-tax-back-when-you-have-stopped-working-p50
You will make an unemployment repayment and keep doing this every 3 weeks until sucjhtime employment resumes.
But one way to full mitigate some of the 40% tax is to consider paying some of the pay in lieu or taxable element of the compensation into the pension scheme held with the employer - (at least £6168 to offset the whole of the annual 40% that we know will arise)
But you will need to ask the pension provider is you can make an additional voluntary contribution to the plan and that this keeps you within the annual amount permissible, then at year end make sure you complete self assessment tax return to claim back these additional relief on contributions which in essence £6168 x 20% = £1233.60 (as you will get the additional 20% relief against the contribution) this will then mean you get refunds for the over charged 40% position, and then still get a refund to mitigate the small 40% charge remaining -
Of course this is dependent on the fact that you can afford to have this go into the pension rather than be money in the bank!
If you have any further questions - with this or in the future you can always start your question with asking for me (Sam) and if any of the other experts start to answer, you can just ask them you would rather wait for me (or whichever expert you need!)
But if you have all you need then it would be very much appreciated if you could rate me for the level of service I provided (or click accept)
if you have any follow up questions on this resposne, I shall responde in the morning as off to bed now!