Depends on the size of the order, as a general rule, and I use the word 'general' carefully you will hear nothing for small intercepts but do not get complacent as only the very stupid make assumptions about issues that could potentially affect your liberty. Love letters are rare as are knocks on the door, one intercept for a small quantity is unlikely to warrant the police time, effort and expense of paying you a visit however I do know that LE can sometimes do things that do not conform to this paradigm and conduct an operation that on the face of it makes no sense, I say this in the Australian context I hasten to add, I have no real understanding of how things operate in the UK on such matters. If you can sever all links between you and your drops then do it.