Simbrief is autogenerating routings from EGLL to the USA via:
EGLL DCT SHA DCT DOGAL NATE…
This is not a route from the UK SRD between EGLL and DOGAL, and is also not IFPS Compliant as there is no SID from EGLL that terminates at SHA in Ireland.
The UK SRD contains valid routes from most major UK airports to most if not all valid Oceanic entry points, so may I kindly suggest that these autogenerated routes prioritise the routes within the UK SRD before connecting to the published NAT Tracks.
