The BBC's main national trucks were the 'triples' - UKI-777, UKI-888 and UKI-999 - you may have occasionally seen their colour bars slip out on air - though I'm not sure if they've been replaced with recent upgrades.
777 is no more, 888 has gone to Leeds but 999 is still going. As is 1091- somehow! 888 and 1091 have had HD refreshes. Two new trucks haved replaced 777 & 888 but with less memorable numbers.
I've a feeling VSAT designation is determined by dish size and power. They don't have to be talked up in the way an SNG would, are often self seeking and auto negotiate with a hub at the downlink site. This makes them ideal for use by shoot / edits (one person operation) or those who aren't fully trained satellite engineers.
Last edited by UKnews on 12 June 2016 1:19pm
Steve in Pudsey gave kudos