Try closer to 150 over the last 18 months! (over 10% of the total qualified drivers). There's a current recruitment ad for qualified drivers but I doubt many will want to come to ScotRail if they are with any of the big intercity TOCs - less money for more work???, a few freight drivers may be tempted by long term job security but ScotRail are not known for being keen on freight drivers but at the moment they'll take pretty much any qualified train driver I reckon!
Should have qualified that with 30+ in the last couple of months, like I said, unless you've got family who would benefit from the travel. I'd be surprised if they got half a dozen