kaled - 7:23 pm on Oct 25, 2010 (gmt 0)

A local hairdresser to me called her salon "Smarties" and Rowntree Mackintosh descended upon them heavily!

I presume you mean they sent her a letter and she caved. My guess is that if she had stood her ground she would have been fine - I doubt Rowntree have a registered trademark for "Smarties" that extends much beyond confectionary (it is, after all, a derivative of "smarty" which is just a dictionary word - albeit rarely used).

Kaled.