Steam at Derby in the summer of 1958

From the blurb on YouTube:

Here we see three very different types, starting with something of a surprise - an ex-GCR LNER class A15 Pacific tank (no. 69816 of Lincoln shed) passing through with a pair of six-wheeled vans and three non-corridor coaches. 

It's followed - to the great excitement of the Locospotters at the lineside - by BR class 7 "Britannia" class Pacific no. 70021 "Morning Star" on an express and, finally, a true "Derby" machine in the form of LMS 2P class 4-4-0 no 40416 shunting a solitary coach.