It was grim out there at times on the bike - the rain hosed it down on the climb then moved to the descent as well for the slower riders.
Trogs missed the finish cutoff but they kept it open and invite all pirates to join her down the finish chute. It was awesome, we had about 20 there with her. She gets her medal at the awards presentation at 11 tomorrow morning. Fair play to IM, she was a full 15 minutes or more outside the cutoff but they'd announced her as the final finisher so she got the full treatment. Just no finish time.
I'm a bit more optimistic because running 1:28 off 14 weeks low mileage training would suggest that's quite a long way short of what you're ultimately capable of. Cycling will help with the endurance base, and another half in a few months would probably be in the low 1:20s. In theory you'd be capable of a sub 3 marathon, but you'll need to pace it carefully because the last few miles will be into the unknown.
Probably you'll fail first time because you'll do what everyone does in your position - start out at 2:50 pace (because that'll feel easy by then) and detonate at 18 miles to finish in 3:15.
Well, lots do that anyway. Not many nail it first time out.
Obviously the answer is yes, you could, but why the rush to go long? You could spend a few years getting competitive at shorter races, maybe aim at GB age group. With a good swim/run base and a good coach there's nothing to suggest that's an unreasonable target. Then move up to IM later.
But if you want to tick the box, then an IM in a year wouldn't be a problem. IM Wales entries are open.