The best travel agent is yourself! We've done lots of trips and just worked it all out ourselves using a mixture of Expedia & TripAdvisor. For booking flights you can use a multi trip site like JetAbroad but if it's just the UK you're doing then you'll probably just need a rail pass.

Just write a list of places & attractions you want to see. Pick your departure and return dates from Australia and start slotting your places list into a calendar. I found we would save money and get more engrossed in the trip by doing it ourselves.

I'm with Ticman for the UK, that's the way to do it.

just wanted the travel agent to guide thru the flights and making sure nothing is missed

been over ten years since i've traveled OS, but would rather the peace of mind of having someone more knowledgeable to help

theres enough travellers here. get a guide book and diy

Find cheapest flights on net, then get flightcenter to match the price.
I am flying back to the UK with the family in March on Singapore airlines and got the flights $1500 cheaper that what was offered by any high street travel agent. I think I found the cheapest flights on http://www.travel.com.au/

If you're going to hire a car, try to avoid the major companies - they really do charge a premium.

Depending on the time of year and deals on, friends of mine have booked and paid for flights from Hong Kong or Singapore in local currency to Europe and just got flights in Australian $ to get to those hubs.

Also be careful of using multiple different carriers to save money, Air Asia X etc, make sure you leave a decent time between each flight, if you miss a connecting flight you gonna be in trouble, where if you use a single carrier they are normally good a fixing up an alternative flight.

For hotels I generally use http://www.hotelclub.com/ for major cities.

we just went to NZ and used flight centre..

if i was going to do it again i'd just do it myself, too much fucking around - for things that got cancelled then after the holiday we now have to go back and get things refunded.. its just painful.

We had a bunch of activities paid for but no exact times booked in - they told us someone would meet us at the other side to arrange exact times for our activities, 1hr of waiting at the airport and 2 international phonecalls we found out that was a load of shit and we were required to call all the activity providers to arrange booking times (which we would have done in australia but were told we didnt need to).

do it yourself, as a guide get them to do a quote with a plan - then follow the plan with your own arrangements

I also found that after flight centre do a quote, you might go back the next day and they say 'oh the prices have just gone up $500'

Don't use them. Misses booked flights to Europe and paid a lovely 500 dollar premium on each flight. plus had 10 hour stop overs in china. The travel agent convinced her if she didn't book now we would have trouble finding flight. Found flights cheaper on skyscanner.com like a week later.

sounds like you need a time travel agent to take you back to a time when travel agents were a thing.

i'm flying thai air to munich for oktoberfest, $1670 return with a week stopover in thailand on the way back