aha - The UK area of responsibility
for SAR covers approximately
half of the North Sea and the
English Channel and extends
out to 30°W. Note that the
Republic of Ireland has its own
Search and Rescue Region
(SRR).
There is a small variation in
the Maritime and Aeronautical
SSRs in the far North. The
large Westerly extent is
intended to provide SAR cover
for passenger aircraft en route
to or from the United States of
America.
from here -
https://www.thecrownestate.co.uk/med...y-projects.pdf page 23
Looks like a good read for those involved in SAR. Some good maps of the planned Offshore Energy installations