Thanks ATC guys, I wasn't sure that you have to use matz pentration to cross the stubs. I always thought basic service would do. Oh well.
Yesterday, I did circuits at this airport (class D) and I was the only one at that time. After 30 minutes or so, another aircraft came in and join in the pattern. I was doing a standard pattern but this other guy was stretching the pattern massively. He was no.1 and I was no.2 at the time. The ATC didn't say a word about it. Normally a circuit takes around 6 minutes but he increase it to 10. It was my first time to come across this kind of thing!
I would like to know what is the correct procedure to do if it happens again in future?
Many thanks