>> No explanation for why strip lynchets would be placed on the North side of the Tor,
>> which gets no direct sunlight.

I'd always thought that this was down to maximising the land. Wasn't the Tor in the middle of marsh back then? So ALL high ground would be planted.

On the north side of one of the Loughcrew hills there are heavy plough furrows. These were planted by desperate people who needed as much food as they could grow.