Wotcha and welcome to the forum - it is very easy to pass comment about which side to pass on sat in a comfy chair, whilst rules are there to ensure common practice on tracks the track days I have attended always put the safety first so if passing on the right going down the straight at Brands Hatch meant avoiding the grass on the outside of the chap who had run out to near the edge then that was fine.
Just glad you all came through it ;)