Adelaide to Dublin and from Edinburgh back to Adelaide for 1800 inc travel insurance. Guess that's not bad considering the distance. Now for hotels...
Sounds pretty good Charged. Think I paid about $1,900 AUD for Munich-Sydney / Sydney-London.
What shows are you doing in London? I'm doing London 5 & 6.
For accomodation, the O2 is in the old Millenium dome, at North Greenwich. Not a lot of hotels around there, no pedestrian access to the north of the Thames, & transport can be a little so-so, from what I hear. The Jubilee line tube stop is very close, but I'm sure it's packed after a concert. There's also river boats after the concert, towards central London, & the Emirates cable car over the river (though not late in the night I believe).
I have accomodation at the Pilot Inn the night before London 5. It's very, very convenient, & gets great reviews. For the other nights that I'm looking at it's either very expensive, or booked out (it's only a small pub).
As there's not many affordable & convenient options close by (I'd like to be close for GA), I'm looking into apartments through airbnb & some other sites. I believe this area was used as atheletes accommodation for the Olympics, & there's quite a few new apartment blocks which are a short walk to the O2.
Just a heads up if you are going down the airbnb route. There is a LOT of construction going on around Greenwich Peninsular, with multiple high rises going up now (& many, many more to come over the next few years). So some of the listings on airbnb, which appear to have great views looking towards the O2, Canary Wharf, & the Thames, may now be looking at a half constructed high rise (Google Street View has very different views). It looks like these current construction sites are supposed to be done by September I think, but I'm not sure if construction will move elsewhere immediately. So I'm just weighing up my options at the moment (also waiting to hear back from 2 friends in Italy re. London 6).
If you are doing London 5 or 6, & would consider sharing an apartment close by, then let me know. For 360's first US leg I did a road trip with Interference fans (U2Brad & Cathal of Me & U2 fame), & had a great time!