I did find though that it was hard to find SE services at St Pancras on arrival from the Circle Line. Plenty of signs for EMT» and FCC▸ and Eurostar, but I had to ask to find SE services, tucked away around the corner. I've never used St Pancras before so more than likely just me - but I'm sure there'll be others out there.
St Pancras has gone from a sleepy great big train shed with 2 trains departing and 2 arrive per hour to effectively 4 major stations in one, I do think the escalators up to the SE
HS1▸ platforms are facing the wrong way, better signage is needed, I am attending a course with one of the International Stations managers I mention this to him. The HS1 platforms are bereft of facilities a coffee stall would be a good addition to their barrier line concourse