junnjam, acting isn't the only profession that happens in. I went from London to Devon for a teaching interview and had to stay overnight. Didn't get the job, along with another candidate from London. The person who was supply teaching it got it. We found out while we were there that it was Devon's policy to only employ people already living in the county and they were interviewing two from outside because they couldn't just give the job it to the supply teacher - they had to interview three.
As we got expenses we ran up as much as we could - upgraded to first class on the train back, had dinner, taxis, etc. Made them pay as much as we could.
Interesting to hear your experience. You'll have to let us know if you're going to appear in something where we can recognise you, but with so many of the big names wanting to appear, particularly in soaps, we can all appreciate it can be very difficult. Hope you get your break soon.