single leaves gets direct platform advance to change

I’m going from Cheltenham to London tomorrow. There isn’t a _____ train, so I have to _____ at Kamble. The train _____ Cheltenham at 8:35 from_____ 2, and it_____ to Kamble at 9:08. Then I have to catch the 9:18, which gets _____ London Paddington at 10:40. A _____ ticket costs £ 22, but I can get a return for £ 40 if I book in _____.