Fear of Flying

I live overseas with my French Griffon called Bracken. I am due to
return to the UK soon and will fly Bracken home with me (under the
PETS scheme), however, I am worried about the plane journey of 7 hours
for Bracken. I have a friend who is also returning to the UK around
the same time. Bracken is best friends with her dog. Would the trip
be less stressful for Bracken if both dogs were on the same flight or
would it not make any difference? I am in more of a panic about this
than relocating to the UK after 18 years overseas!

Thanks,
Isobel Salmond