Thanks everyone for your replies.
With regards Tail-take-off's reply, am I correct in thinking that if you were in flight under the following conditions you would require an alternate:
a. within 2 hours of destination
b. destination has 2 runways
c. weather is forcast below 2000'/5K
I know this is pretty basic stuff but I was interested to see the different requirements between CAA and the rules we operate under.