Indeed, it has many routes, but it tends to skew towards leisure destinations. Also, Heathrow has the vast majority of the premium demand, so, for example, airlines that have aircraft with a First[0] cabin will schedule those aircraft to Heathrow and not Gatwick. It might seem strange to be discussing premium demand in the context of connections from Accra, but the toy-spitting that happened when BA tried to move the flights to Gatwick was coming from high-ranking politicians — who are certainly not flying in economy.

[0] International First, not what is called First in the US.