We just got back from our trip & thought I'd report our experience. (DH in business, me in economy)

Lounge in Dublin was OK - we paid for me to go in & they were just finishing breakfast & putting out lunch. Walk up bar (ran out of Guinness by midday). Selection of wraps/ soup/ cheese etc.
DUB - LHR was packed - ran out of food choice (was ploughmans or sandwiches)
Lounge at LHR kindly let me in FOC. Most drinks were self serve (had to ask for sparkling). Really good choice of hot food. Much better than at DUB.
LHR - HEL was pretty much full. DH sat in 1A & said never again after being hit by people luggage constantly during main boarding, He thinks he ate pasta!

Stayed 2 nights at the Scandic Helsinki Airport - very happy with hotel choice - easy to find, comfy beds, free breakfast, pretty foyer.
Absolutely loved Helsinki & walked 10+ miles during the day.

HEL - LHR - left on time. Choice of continental or full English breakfast. No time for lounge.
LHR was busy so no lounge for me. DH said it was 'ok' but I think he was feeling guilty.
LHR - DUB - he swapped seats & let me sit in business. Choice of sandwiches or meat platter with scones & cream & a tart. Lovely! Business was full.