Considering SBST / BSEP is adding B9TLs to its services and
there is a new surprise every week such as svc 21, 69, 90, 94, 119.
This forum is to wish / predict the next service to get a B9TL.
Could be an existing svc such as 21, 69 to get an extra B9TL
or like svc 90 that has VO3x and now got B9TL perm or like svc
94/119 to get fresh DD addition.
My guess is svc 70 might get an additional B9TL (replacing SD)
and svc 74 might get a Wright perm (high time).