To answer some of your questions...
Standby's can be odd single days or a block of five. However usually three to cover a trips duration.
The course runs for a little under six weeks. It is quite intense considering your only fleeted on one aircraft but the new 767 we are acquiring will be a variant from the silverspirit.
Also the cabin service aspect of the course will no doubt be more detailed than any previous airline training as we do things quite differently at SilverJet.
With regards to course accomodation remember you are contracted to work from London Luton so you will need to make your own arrangements for this during the duration of the course. I myself stayed at a number of Travel Lodges around the area and if you book enough in advance then you can get some excellent rates.
Hope this info is of help.
Also just spotted the new SilverJet ad on youtube, check it out!
Iconic