East Midlands Trains is taking legal action against a trade union, after members stopped doing overtime at the company.
Members of the Rail Maritime and Transport union banned overtime at the rail company, which caused disruptions to rail services, including cancellations and delays.
East Midlands Trains says the strikes are illegal, but the RMT union will challenge them in court.
More top news
It will be a grey start to Monday with patchy rain and drizzle moving in from the south.
Perhaps locally bright at first, but increasing cloud will bring periods of light rain from the south. Winds generally light.
Tonight will stay dry for most. There will be clear spells this evening leading to a chilly night to come.