I wish they (or someone) would publish a map, for the benefit of those of us who are unfamiliar with Norwich city centre. At 2.50 she enters the cathedral grounds, and at 3.22 she exits "through the archway" which may possibly mean she exits from the cathedral grounds having stayed in them since 2.50, but not knowing Norwich I don't know. Certainly a cathedral close can be distinct and separate from what people call the cathedral grounds and it can have its own archway entrances. (Whether this is so in Norwich I don't know.)
Norfolk police say the last sighting of GL on CCTV was at 3.49. They then list three later times and places at which she was walking - and a fourth when she was either stationary or walking and in connection to which they refer to a sighting.
How are the police choosing what info to release? What we're getting is almost all to do with GL walking after she left work, rather than, say, any points at which she stayed still, or spoke to someone, or did something other than walking along, and what she did before she left work, whether an hour before or a week before.