Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many trains call at Castor, Overton, Peterborough East and are operated by LNWR?

### Inputs:
table_name: table, columns: ['Departure', 'Going to', 'Calling at', 'Arrival', 'Operator']

### Response:
SELECT COUNT Arrival FROM table WHERE Operator = LNWR AND Calling at = Castor, Overton, Peterborough East