There are a few of us in/from Ipswich training for IM Austria next year (the Pirate outing) & another mate, in Bury, going for the same. I imagine your new born will take precedent over 'going long' in 2015.
My first event was the Braintree District Triathlon sprint. It's held in Halstead around June time. Well organised event (pool swim), pretty cheap and a nice local starter.
I've not been involved with Ipswich tri club but they're pretty well established & I've heard good things.
Stowmarket District Cycle Club (who ride out from Claydon) are a great outfit. Their Saturday social rides kick off at a sensible hour (9AM BST, 9:30AM GMT). They go longer on Sunday and have an array of mid-week evening training which is great when it's not pitch black by 5PM. Definitely give them a look.
Open water swimming is a pain. It's Gosfield lake in Essex (50% goose slurry) or Fritton lake near Norwich (lovely but a blood long drive). There's a bunch of sea swimmers Felixstowe Swim Scapes (I think). I've not swum with them but you'd do well to get in touch in build up to Great East.
I shant bore you with more right now but you're welcome to drop me a line if you're after more local info. Otherwise there are lots of brilliant triathlon brains to pick on this forum & some less so brilliant but equally as eager to help (I have a foot firmly in both camps).
Oli - if you're tackling the Great East Swim at Alton water - does that mean you're local? I've just moved away from Ipswich but still spend many of my weekends back there training with buddies. I'm happy to point you in the direction of some good local events, clubs, rides, run routes etc.
Definitely a stark contrast in the course profiles!!
How did you get on in Wales?
"Marathon is a very honest distance" - A statement I proved in Snowdonia when my wheels came off between miles 21 & 22. Four very hilly final miles averaging a plod of 16-17 minute miles. 4:34 finish & here's me thinking I'll be going the south side of 3:45 in Dubai...