How long the skills test lasts depends on your skills and the examiner. This isn't a full PPL skills test, so you don't have to do a nav. I've heard as low as 20 mins total, and as high as 1.5 - YMMV!
It's 5 hours plus test, although if a TRTO is authorised (ie. it's written into their ops manual and AOC), at the CFI's discretion, they can reduce the training requirements to 3 hours plus test, if (in their opinion) you have sufficient experience on a similar type. Unless you have quite a lot of experience, though, I wouldn't rely on this.