It's quite common to have the units for five, if not six, services stabled at Nottingham in each of (usually) platforms 1 and 3 at the start of the day, e.g. first two passenger services to Worksop at one end, first Skegness leading at the other end, Lincoln behind that and finally a set of empties to Newark.
During the day, certainly pre-Covid, it wouldn't have taken much disruption to end up with five trains in a through platform. Leicester - Lincoln in first, followed by a Liverpool - Norwich to detach a portion at the rear, with an XC unit coming in behind that and finally an arrival from Mansfield dropping in on top for a short turnaround before going back out to Worksop. The first couple were booked to have left before the last couple arrived, but everything still had to be drawn right down to make room, and it would only have taken a 10-15 minute delay to the Lincoln going to end up with them all stacked up.