You are nearly right :) The formal you is said in the same way BUT it is written with a capital "il Suo" so as to indicate that it is the formal you.
Thanks for that useful bit of information. I'd forgotten the difference between Lei and lei, and therefore suo and Suo.
SUO could be HIS or HERS ... dont understand how this is specific to HER??
Couldn' it also be "solicitor" or is that word not used anymore? Or it just doesn't mean what I thought it means?