The following 45 amounts were observed in duplicate on a particular programme: £100, £125, £150, £175, £200, £250, £300, £400, £450, £500, £550, £600, £700, £750, £900, £950, £1,000, £1,100, £1,200, £1,250, £1,500, £1,600, £1,800, £1,900, £2,000, £2,500, £3,000, £4,000, £5,000, £5,500, £6,000, £6,500, £7,000, £7,500, £8,000, £9,000, £9,500, £10,000, £11,000, £12,000, £14,000, £15,000, £18,000, £20,000, £25,000