In message , at 14:13:18 on Sun, 29
Jun 2008, Steve Fitzgerald ] remarked:
At the time, I remember a lot of complaints that the new 50p and 2s/10p
were too similar and could be confused, especially by older people. I
think originally the only difference was

They had different writing on them too

that the 50p was very slightly larger and had the pointy sides whereas
the 2s/10p was round.

And an unmilled vs milled edge, iirc.
--
Roland Perry