All depends on the number of stops and where your delivery is going to be: Felixstowe or Tilbury.
Our shipment from South Africa went from Cape Town to Durban to Madagascar, to Reunion Island, then somewhere to India. Landed up in Singapore and then on to Sydney before going on to Perth, our final destination. It took eight weeks.
In contrast, our return from Perth to UK, took six weeks, both on a 40 ft container.
I could be wrong and it could be much faster now.
Very best of luck to you, andrea60. x