Tuesday 01 Jan New Year's Day
Friday 29 Mar Good Friday
Monday 01 Apr Easter Monday
Monday 06 May Early May Bank Holiday
Monday 27 May Late May Bank Holiday
Monday 26 Aug Summer Bank Holiday
Tuesday 24 Dec Christmas Eve (Markets closing process commences from 12:30 London time)
Wednesday 25 Dec Christmas Day
Thursday 26 Dec Boxing Day
Tuesday 31 Dec New Years Eve (Markets closing process commences from 12:30 London time)
Source: http://www.londonstockexchange.com/about-the-exchange/company-overview/business-days/business-days.htm