My Forney had a Star on the smoke Box Plate. Here in the US RR didn’t put stars on there it was used for Numbers and headlamps and such. Not to say it wasn’t at all but here in PA it was the norm for engine # and RR logos and headlamps http://freightsheds.largescalecentral.com/users/paps101line/_forumfiles/NYC
Old logging company’s didn’t need numbers if you only had 1 engine. Not even steel rails here.
White Deer & Loganton RY #1 near my home in early 1900’s sports a # 1 up front.
The PRR used a Red Keystone with Bronze numbers on the Boiler Front. Here is a Hillcrest #9 sporting it’s 9 on the front
I don’t see any stars. So if you want a star on the front of your Loco fine. But I want a number on mine. Just like my Great Pappy had, When he run his #1 Climax. And if you live in Jolly old England and yours has a handle, go for it. But don’t knock someone for doing what they want.