The first episode of Saturday Night Live UK has hit our screens - 50 years after the US original - and largely got a warm welcome from critics, but it failed to raise a smile with some. When it was announced, there was wariness about how the comedy sketch show would translate for a British audience. That was partly assuaged when the cast, made up of up-and-coming talent rather than established names, was announced. As with the American version, each episode has a guest host and the British debut was fronted by Tina Fey, who made her name as a cast member on SNL. There were also surprise appearances from stars including Nicola Coughlan and Graham Norton. The overall feeling was that there were hits and misses during the 75-minute opener on Sky One, with its skits on Paddington, Hamnet and Sir David Attenborough.…