After the explosion, when Jane returns to the station to change into her uniform, one of her divisional collar letters is missing. By the time she reaches the CID office, it has returned.
The destination on Silas' air ticket from London reads Cyprus, the country, when it should be a city, presumably Nicosia.
When Jane is calling for backup over the radio at the pub she says, "Five One Seven to Golf Hotel." In the Metropolitan Police, as with most other police in Britain, the receiving station is given first. Her message should have been, "Golf Hotel from Five One Seven.'