A company has the following results for the 14 months to 31 December 2020:

Adjusted trading profit, before deduction of capital allowances 1,413,510

Capital allowances claimed:

Year to 31 October    2020. 222,650

2 months to 31 Dec 2020      37,210

Capital gains:

Disposal 12 May 2020 16,586

Disposal 6 October 2020 21,692

Building society interest:

Received 31 December 2019   3,500

Received 31 December 2020   4,000

UK dividend received on 25 November 2020 5,150

Accrued building society interest was £2,000 on 31 October 2019, £4,000 on 31 October 2020, and £1,000 on 31 December 2020.

Required

(a) Compute the company’s total corporation tax liability for the 14-month period.

(b) State the due date of the payment for all the relevant accounting periods (You should assume this company was large in the previous accounting period)