I'm voting for 1.
Reasons, from a German ATC point of view what is
MALOT? Whilst it maybe the valid filed OCA entry point why would the german ATC know about the UK AIP or the 'Oceanic rules for transit' or the OCA point about 2 hours outside of their airspace?
Would you expect them to know about the transition arrangements for Iranian airspace or Indian Ocean points, of course not.
AFAIK, the Atlantic Oceanic Crossing clearance delivery and expectations and limitations are very (very) unique.
But it does raise the old chestnut in my mind, what is a flight planned route? The one you have filed, the one in your FMS, the one dispatch accepted on your behalf after you were airborne, the one the active ATC unit has, or the next unit, or the next?