Yes definately count it as an all day event.
I got there just after 8.30 as my train was delayed. This wasn't a problem, but I did phone them to let them know I would be a little late.
I think 10 people were there to sit the test in total. The staff had to sit with each person and check their documents and forms and register that they were there. This took a little while.
I was very surprised at how many people hadn't brought the right documents or that someone would even fill their form in with blue ink. ( I was specifically told to use black ink and I think it even says to do so on the form...)
The test takes around 90 minutes, you can't leave the room during this time. Make sure you have glasses if you need them.
The lady who administrated our test was a civilian administrator, I thought she actually made us feel at ease at the same time as making sure we understood the rules.
After the test we had a break they sent us away for an hour so that they could mark our tests and we got some fresh air and I bought myself some lunch! (it was 12oClock) we went back in for the presentation. There was some good information, you weren't bombarded with it either and it was a good time to ask questions.
When they gave us our results they took us into a separate office one by one, in a random order and then gave a quick explanation of the scores and a "well done". I was able to book in for my interview at that time too.
It was 2pm by the time I left and I was one of the first to hear my results. I think if you were the last you may have been there another hour.
So in answer to your question.
Yes!
