Both through independent research and yes playing Battlefield 1 I’ve realized that Britain seemingly did far less weapon experimentations than other nations, as by the end of the war most of the major European powers, namely Germany, France, and Italy but Austria-Hungary, the USA, and Russia as well to a smaller extent had gone though trials and even small scale adoption of Semi-Auto Rifles, SMGs, and Automatic pistols while the closest the British got was the Farquhar-Hill Rifle, even that was pretty much the most modern British infantry weapon design of the war. Was this lack of adoption and research due to the fact that other projects such as tanks took up too many resources or was British high command generally satisfied with Enfield Rifles, Lewis Guns, and Vickers guns? Sorry if the formatting is bad I posted this from mobile
Well, your question mentions Farquhar-Hill self-loading rifle. In reality, this weapon (along with its French counterpart, the RSC Mle 1917) went far beyond minor experiments, and was slated for major deployment in the planned spring 1919 offensive. Obviously, this didn't happen, but the British were as close to the bleeding edge in this regard as anyone else. Also, the British, much like many other nations, experimented with self-loading conversions of bolt-actions, such as the Howell Automatic Rifle (which is also in BF1).
Further, the British had some very advanced weapons at the start of the war. The Short Magazine Lee-Enfield had a capacity of 10 rounds, a detachable box magazine (though it was not normally detached in combat) and could fire extremely quickly, whether in the hands of an expert or a conscript. The Lewis gun, unlike virtually every major other light machine gun of the war, was not obsolete by the outbreak of WWII (the only change they made was getting rid of the silly aluminum barrel shroud). This is contrast to the Browning Automatic Rifle (which was, sort of ironically, regarded as the best light automatic weapon of the war, but was still completely obsolete by 1939), and the Chauchat (which was a great gun in reality, if only the ones chambered for 8mm Lebel).