Lucky Ltd was incorporated on 20 July 2014, and commenced trading on 1 December 2014. The following information is available for the four-month period 1 December 2014 to 31 March 2015:

(1) The operating profit for the four-month period ended 31 March 2015 is £532,600. Advertising expenditure of £4,700 (incurred during September 2014), depreciation of £14,700, and amortisation of £9,000 have been deducted in arriving at this figure.

The amortisation relates to a premium which was paid on 1 December 2014 to acquire a leasehold warehouse on a 12-year lease. The amount of premium assessed on the landlord as income was £46,800. The warehouse was used for business purposes by Lucky Ltd throughout the period ended 31 March 2015.

(2) Lucky Ltd purchased the following assets during the period 20 July 2014 to 31 March 2015:

The integral features of £141,200 are in respect of expenditure on electrical systems, a ventilation system and lifts which are integral to a freehold office building owned by Lucky Ltd.

The motor car has a CO2 emission rate of 82 grams per kilometre.

(3) Lucky Ltd made a loan to another company for non-trading purposes on 1 February 2015. Loan interest income of £700 was accrued at 31 March 2015.

Required:
(a) State when an accounting period starts for corporation tax purposes. (2 marks)