Matt does not say he went inside Russell's apartment, so the shortest route is via the alleyway between block 4 and 5 and then along the alleyway leading to the road. That is the route I think he meant by the shortest route. There is no need to intrude into an apartment that has a sick kid in it.
Sorry Rob but I think that you have your distances wrong.
I did some rough measurements on GE from Russells flat to the gate at the bottom of the steps up to 5A.
- From the back of Russells apartment via his garden and the rear pathway, I made the distance about 38 metres.
- From the front of Russells apartment, via the route you are suggesting , I made the distance about 98 metres.
and
- From the front of Russells apartment via the normal route, I made the distance about 45 metres
So the shortest route was as Benice suggests, via Russells apartment and the back pathway.
Matt going into Russells apartment is confirmed in Russells statement.
Matt also confirms this in his statement with (quote) He clarifies that Russell's daughter was ill, with vomiting. (unquote)