Not sure if this is the correct spot or if anyone has posted this before, but it is good to get the views of your MPs. I got a reply from mine in the same day and although he isn't a shooter, he did understand the role and value of shooting and was overall supportive. Pity he wasn't the one I'd be voting for!!
The link takes you straight to the BASC page and all you need to do is put your post code in and then tick which MP you want to send the pre-drafted letter to.