Sorry to see no answers, so I'm going to suggest you become the first in your area and get yourself a copy of Toaf:
https://toaf.roverki.eu/index.php/en/ and a Toaf compatible cable:
https://www.ebay.co.uk/itm/174768878...1&isGTR=1#shId
You will then with any Windows machine be able to diagnose your own SRS & ABS faults and judging by the lack of answers be a most popular local resource.
Otherwise try Rodger's as they used to service Rovers, one at Crownhill, used to be one in Union Street and one out Plymstock way, they might still have a T4 somewhere.
Regards