Top Jock has basically summed it up.
I was a dispatcher at for FR for 4yrs and my advice to you is dont even consider them!

I was on the flight deck of my assigned a/c every turnaround doing the loadsheet if i had a £1 for everytime i heard the crews moaning i would be a billionaire!
Only reasons the captains i knew stayed was for the money, nothing else. If your a new F/O you will get shafted from day one, not to mention you would have already had to pay for you own type rating!

A friend of mine started as an F/O with them last year and earn't less in his first year than i did as a dispatcher!

Look elsewhere!
Matt