All of a sudden this has raised its head. Ironman emailed saying I could achieve the triple, having already finished Bolton and Tenby I could be a finisher of all three full distance UK Ironman races, and get a special t-shirt, and for some reason, it's floated my bolt.
Couldn't do Tenby in 2016 as it clashes with family milestones, but September 11th is good, and wifey has signed off on it.
Likewise Re pushing off too hard and cramping. Try pushing off nice and easy or turn just before the wall and not push off, will result in marginally slower splits, but will benefit in practice starting from a standstill