A London Council is named as "Brentworth". No such Council exists, it's clearly a combination of the real council's of "Brent" and "Wandsworth".
It is established that the flat used by the cell is in the fictional Council of "Brentworth" but when the van with the bomb arrives at the flats, signage for the real "Southwark" Council can clearly be seen on the side of the flats.