* Whilst Fidessa continues to see structural and regulatory
drivers within market, there is clearly a degree of uncertainty
as a result of Brexit vote
Fidessa Group Plc said on Monday it expected revenue to rise 4 percent this year on a constant currency basis as changing U.S. and European regulations boost demand for its trading software.
* Shares hit highest in 16 years
(Adds analysts comments, background, share movement)
Aug 1 Software maker Fidessa Group said
on Monday there was a degree of uncertainty in the market as a
result of Britain's decision to leave the European Union.