Yes is the short answer.
The plant's job is to produce fruit, then the fruit seeds so that the species will continue.
Picking courgettes and runner beans makes the plant grow more. Similarly with sweet peas, keep cutting the flowers off and they keep flowering.
Not all plants (or varieties) are the same, some will just produce one crop but others will continue to reproduce until they are exhausted.
It depends what you want from your plant how you crop it but at this time of the year the damp and cold will take it's toll.