There was an unexpected roundabout on the A47 Thorney by-pass that wasn't on the M+M when I drove past at the beginning of the month. It's now there.
There are new sections of road being added all the time to this countries road network, and some sections are removed or by-passed. It's useful to be up-to-date, and less stressful on a journey if the road indicated on the M + M is actually there.
Nick