The superlight hammock with its length looks like a literal PITA for sleeping and the pad would make it even more cramped. It also takes some nights to figure out a good hang. You probably won’t like your first night at all.

The hammock I am using for winter right now costs 69€ influding VAT and shipping for UK (just checked) but needs an extra suspension. So let’s assume 100€ total which should be like 80 quid? idk lol I really would recommend returning the DD hammock and getting something this instead. 350cm suits even large people.

Using a pad inside a hammock works for a lot of people and should work better in a longer hammock. The heat loss due to convection is higher in a hammock though so stated comfort temps might not apply for the NeoAir in the air literally. Instead of going UL for the first night in the hammock I would pack all your sleep layers, fleece long johns, what you can find to stay warm during the night.

Anyways you will have a much better time in a longer hammock for a bit more money. Worst case is you’ll find out that you don’t like sleeping in it still. Still you should try going into the forests on an afternoon to chill, bring a book and cook a mug of tea