The ownership and use of .22 calibre rimfire target pistols was banned in GB in 1997. There followed many short-lived campaigns and petitions to try to reverse this. The 2014 petition and campaign was the last major attempt. The 'pistol thing' is not 'over and done with'. I think future campaigns will follow where the timing and political landscape is receptive.
To use your phrase, there will be people interested only in target shooting with pistols referring to the current 'grouse thing' as over and done with. This is the nub of the issue and the point of the 2014 campaign was that it was a UNITY campaign. However, most did not see it that way and did not get involved. That was an issue then and is an issue now.
The 2023 'Act Now' campaign was supported by all orgs and sporting press and we all tried to rally everyone to respond to the Welsh Govt proposals to ban the release of gamebirds. That achieved 42,597 responses after a massive effort over a 3 month period and WJ achieved 45,000 signatures to a govt petition to ban driven grouse shooting with a few emails and social media posts after 2 months.