Table:
text: British Rail Class 153
Fleet
Fleet
Class_ Operator_ No_Built Year_Built Cars_per_Set
Class 153 Arriva Trains Wales 70 1991–1992 1
Class 153 East Midlands Trains 70 1991–1992 1
Class 153 London Midland 70 1991–1992 1
Class 153 Greater Anglia 70 1991–1992 1
Class 153 Northern Rail 70 1991–1992 1
Class 153 First Great Western 70 1991–1992 1

Question: Can you tell me the total of wagons per set for the London Midland operator under British Rail Class 153?