Sympathy goes out to you mate, i nearly lost my life a few years back in a 100+ collision.
110% blame on me, driving like an idiot!
Cars just dont crash by themselves though, you say you were travelling at 65-70mph but yet say you crashed at very high speed

By the time you had applied the brake and lost speed through the spin, probably a 40mph collision.
Also, i have hit plenty standing water puddles at 65-70mph on dual/motorway and always remained in control . Im sure aquaplaning is only applicable at around 80+
Some blame must lie with you, as to be fair cars just dont crash by themselves

Quiet motorway, late at night
All the best with claim and new car though and glad to hear your okay