MAN_dispatcher,
Go still use Groundstar at STN. Ryanair's switch has led to some problems at peak times with baggage times (from aircraft hold to baggage belts) as I understand it, with Groundstar having both Ryanair and Go flights to deal with now.
I might be wrong though- when I flew into STN about a month ago the baggage was surprisingly quick, but we did arrive at midday.
Cheers,
Landing_24R