Outbound routing to BOM

Travelling to BOM on Saturday-does the routing take a Clacton or Dover Departure. Is it possible to predict which actual A343 will operate-realise this may be a security no no and understand

I flew it a couple of weeks ago, and we headed out directly over Brussels, and crossed the channel where it was pretty narrow, so I guess that was Dover..... But I wasn't paying attention!

My Jet flight last week took off easterly and didn't really turn taking us down the Thames estuary. But it is a long and boring flight that ends up covering Germany, some other baltic states, Turkey then finally iran before a over the water and in. Don't watch the map! watch a film or two instead.

Paul