The examiner could also drive behind you in a car instead. Which is quite different to having your instructor behind on a bike.
He'll say continue unless instructed to do otherwise, and if (like on my test) you do it somewhere busy, you'll make much quicker progress in certain situations than a car (and maybe fail if you don't actually), so you'll either be riding on your own quite a bit whilst he catches up (he must have broken a few speed limits), or find he's asking you to pull over quite often.
I passed 1st time, to my surprise, but do yourself a favor and don't ask what the pass rate is at your test centre
