Massimo Giovanni
Old Timer⭐⭐
As I've told you before, I don't do hypotheticals.
I would, however, be prepared to countenance some British military action (preferably under a UN banner) to take on IS.
Last time I checked the RAF is British and military and taking some action.
And the RN has warships out there too assisting coalition partners.
If you mean ground troops then I suspect that there may already be some special forces doing some wide reaching "training and co=ordination" with the Kurds and other (anti Assad and ISIS) groups.