Yes, the training will take place in Leeds.
I'd drop HR and email regarding the phonecall, don't think they will be in until Tuesday.
There's plenty of courses this year so I doubt the June one will have been cancelled, may just be that an extra place came up on the May course for Si-leeds.
I'm a Conductor so if you need any advice, pm me or post on here, however the trainers are excellent and will give you all the help you need.
Andy