I'd heard of HWDC (Royal Mail's Heathrow World Distribution Centre at Langley) before, but not GBLALA, so a little research was called for. I found this
link that seems to suggest that GBLALA is a code used by Parcelforce.
RM and PF are part of the same group and so both may operate at Langley. I wonder which will deliver your package?
Then there is this
link that says:
It is claimed by Royal Mail that an item can be processed through Langley in 18 minutes!
The flies in the ointment are these:
1. Customs processing can take up to 8 (eight) weeks regardless of origin (EU or not)
2. There is no tracking within Langley (common sense might suggest that they track inbound, sent to Customs, received from customs, outbound) but no.
Sorry about that. For a bit more reading while you wait, see this
post (
link).