Photo: St Paul's Cathedral ahead of Margaret Thatcher's funeral 15 April 2013 | 11:03 AM A young woman walks past steel pedestrian barriers close to the rear of St Paul's Cathedral, as the construction of a ring of security begins before the funeral of Baroness Thatcher on WednesdayPA Security barriers are erected near St Paul's Cathedral, as the construction of a ring of security begins before the funeral of Baroness Thatcher on Wednesday, in the City of LondonPA A lorry with huge steel road barriers waits close to St Paul's Cathedral, as the construction of a ring of security begins before the funeral of Baroness Thatcher on Wednesday, in the City of LondonPA Preparations begin for the funeral of Baroness Thatcher next wednesday at St Paul's cathedral in LondonPA Preparations begin for the funeral of Baroness Thatcher next Wednesday at St Paul's Cathedral in LondonPA