The Archers' scriptwriters aren't an impeccable source. Because of the importance of the village cricket team, they used the words in a strange way. In metaphor, wickets are usually sticky, but Raymott is obviously right.
I thought of that, and also the expression 'on the same page', but the 'wicket' idiom has more of the idea of having the same tools and having to operate in the same environment. 'In the same boat' is a bit nearer, but that has more of a sense of having to survive (by 'pulling together'). There's also the expression 'on a level playing field' - but that is used when different people have different conditions (and a change in the law, for example, makes the situation fairer).