Complex sentence: Historically, trunk roads have been listed on maps with a "(T)" after their number, to distinguish them from non-trunk parts of the same road, however this suffix is no longer included on current Ordnance Survey maps.
Split into simpler sentences: Historically, trunk roads have been listed on maps with a "(T)" after their number, to distinguish them from non-trunk parts of the same road. However, this suffix is no longer included on current Ordnance Survey maps.