When Lowland Scottish took over the Borders and easternmost East Lothian operations from Eastern Scottish in 1985, it inherited the main depots at Berwick, Dunbar, Galashiels, Hawick, Kelso and Peebles, plus the outstation buildings at Jedburgh and North Berwick, whose parent main depots were Hawick and Dunbar respectively. Vehicles based at these two outstations shared the same depot codes (H and D) as their parent main depots.
In First days, the Jedburgh and North Berwick buildings became depots in their own right and got their own codes - J and Nb, though Jedburgh's new status would turn out to be short-lived as it closed in 2000 after Munro's gained the contract for the A68 corridor services between the Borders and Edinburgh from First. The building at Jedburgh still exists today, despite having closed as a depot nearly 20 years. NOrth Berwick, meanwhile, remains in use with East Coast Buses.
It's worth noting that of the six main depots inherited by Lowland, the only one still in use is at Galashiels, with Borders Buses. The depot building in Hawick still exists, but is no longer in use, whilst the Berwick, Dunbar, Kelso and Peebles depot sites have all been redeveloped.
By way of a contrast, when SMT outstationed vehicles in Duns, there was no physical depot building to speak of. The Duns "outstation" was two spaces on the north-east corner of the town square!
More recently, when Northumbria had some contracts for services in the Duns and Kelso areas in the early nineties they oustationed a Metrorider minibus at Swinton, near Duns, and allocated a regular driver for the work. It was kept at the driver's house and the duties were organised to allow it to return to Berwick for fuelling and maintenance.