Alright mate,
Great idea moving to Perth. I spent 10 years scaffing in London, (originally from NZ) then moved to Perth about 2 years ago. It's a different life out here mate!!! The weather, lifestyle and atmosphere is awesome. And the money is EPIC! There are a lot of 'green' scaffies out here, so anyone with experience in the UK is very highly regarded. Jobs are easy to find, and you can rely on earning between $2500-$3200AUS per week. You'll need to consult with an immigration expert, but most of the Brits and Irish I know over here, arrive on a 'working holiday' visa, and then get sponsored by their compant to stay on until they're residency comes through. If you're a half decent scaffolder this is usually pretty easy. You're UK tickets are not valid here (don't even get me started!!!) but you can easily change them over in under a week.
The Gorgon Project is kicking off as we speak, and within the next 12 months they will be hiring 1500 scaffolders. The rates are roumered to be the best in the world, (not counting 'off shore')
Happy to answer any questions you have, and if you do decide to make the move, stay in touch and I'll hook you up with a job.
Chris