I wouldn't call it a sketch show as it's all about the same character, in the same situation.
Either way, it's damn entertaining. Really well written. I've loved every one of them so far. Only criticism is that there's no way on a tiny digital radio station Alan would be getting as many listeners as it sounds like he's got (based on the emails, txt etc he reads out)
(All the episodes are here for anyone reading this that might have missed one: https://www.comedy.co.uk/features/alan_partridge_mid_morning_matters/)