Regards to TVSC:
There was a pool of job offer ready applicants about 12 months ago ready the Bristol Temple Meads (Link 4) jobs - this however was dreaded to fill said link (13 of a 15 man link!).
TVSC is a fantastic place to learn the craft of signalling, up to date equipment, very busy route with all the drama that goes with it.
However, central to the retention problem is its location - Didcot - being so close to London house prices are stupid, quality of life isn’t great.
Of my course of 7 in 2017, only 2 remain less than 18 months later we’ve all moved to different locations closer to home, this has been repeated across the link 4 guys with people again moving closer to home.
I’d suggest if you have a strong CV and work experience, show willing you’ll probably be in with a good shot at the jobs - even grade 9 jobs are going to external people.
Most current grade 7s at TVSC won’t/don’t bother going for the grade 9 jobs as their planing on moving to a closer to home location or the extra £3k isn’t worth the hassle of learning four new workstations.