I have 2h in LHR (Flying in Polaris from ORD, then LH hop to Germany) and plan to check out a lounge in addition to the LH SEN lounge (which I assume will be closest to my gate).

Would it be worth it to clear immigration (EU passport) to get breakfast (Shakshuka? ) in the arrivals lounge (kinda have FOMO as I usually don't fly to long haul to London) or should I rather check out SQ/AC/UA for brunch?