Must reply to you WHBM.
In general you are correct, although, today, Helsinki has been having a few problems.
The main cause is that the wet snow is very heavy and difficult to clear.
There may be "more runways than LHR" but, today, the airport authority announced that they would attempt to, solely, keep one open.
Helsinki does have the advantage of space, enough to allow remote deicing for instance.
If it needs to grow, just cut down some more forest.
Sadly that does not obtain at LHR - or too many airports in the UK.
The trains are having a few problems, the line to Turku was cut earlier (may still be) - heavy snow is causing trees to fall over.
There have been many road accidents, despite winter tyres being compulsory since the beginning of the month.
As you may know, if you have driven here, the idea of giving way and allowing extra distance is an anaethema to many finnish drivers.
There are warnings of power cuts in Southern Finland - at least it is not -30 or -40, as it will be in the new year.
However, tomorrow all will be back to running smoothly in all probability as it is forecast to get warmer overnight.
I think given the constraints LHR and BA do pretty well really!!