Is there a Stata package that can calculate the distance of an address from a category of landmarks?

In particular, I am interested in calculating the distances of London addresses from tube and bus stations respectively.

In the absence of Stata packages, any other suggestions on how I could get these data and incorporate into my massive dataset would also be highly appreciated. (my dataset has addresses broken down into multiple columns (e.g. street, postcode etc), but I could obviously merge into one column, if that helps at all)