The TVC 476 indicates that the postcard was censored in London as well. The cancellation looks like Dinapore which was one of many detention camps that did not have a censor at the camp. Bombay censor office would handle all of these. Only a few were also censored at London.
Dann Mayo has listed this item in the ebay. where the cover to Ranchi has been redirected to Dinapore civil camp. There is a delivery stamp of Dinapur too at the back. .