It wasn't my intention originally to go to the flat, it was my intention to  reconnoitre the area  in order that I could supply the officers who were going to do  the actual operation with up to date information as to  erm  the methods of getting in to the block of flats because they had a coded key door  erm and to acquaint myself of the actual physical erm  presence of lifts, stairways and that sort of thing.