I'm catching a train from Euston at 20:25, do you think skating at Somerset House till 19:45 is easily doable? I was hoping for the session before and then a couple of drinks at the Tom Aikens bar but this session is sold out. I suppose I could always get there earlier and have a drink or two before, may help the skating.

If this is possible what would be the quickest way, walk to Embankment and straight to Euston? Is there much of a walk from Euston underground to mainline.

edit to add: Looking at the map would it be easiest and quickest to grab a cab from Somerset house to Euston? Looks a straight road apart from around Russell Square.