Plus fours.Very interesting. The gentleman appears to be wearing a kilt under the Burberry coat. If so, this is the first time I have seen a kilt and raincoat combined in an image. One usually sees pictures of men wearing kilts in all their splendour, without anything else on top of them. Likewise with the hat, a fedora as opposed to a Highland cap, unusual in a kilt-wearer.
You know, I wondered about that but decided that, as far as I could make out, there was no slight break in the middle which would signify the trouser legs, as opposed to a continuous line which would indicate a kilt. But I agree it's likely plus fours, maybe my eyes are not too good!Plus fours.