Originally Posted by
remymartin
It’s not a very fun transit, though. Arrive at gates 40ish and walk to gate 5ish. Walk along the tarmac and squeeze into an atr72.
Unless you have a long connection and can enjoy the Platinum AY non-Schengen lounge on arrival from LHR before you go through passport control. Or if you like the ATR72 (I found it a sweet little plane when we connected in HEL to TLL, but that’s a geekish view…)