In 2013 the RAL Tier-1 switched its batch farm to using HTCondor. In the years following, several more UK sites have made the switch. The RAL Tier-1 batch farm is now well over 20000 job slots and HTCondor is a key service delivering our pledged resources to the WLCG, now and for the forseeable future.
New funding opportunities are available to provide computing in the UK to the "long tail" of science. These are science experiments with only a handful of users but ever growing computing requirements. This talk will discuss how the RAL Tier-1 and other UK sites needs to evolve to meet these changing requirements.