Originally Posted by graraps

You shouldn't have a problem doing it with the UK office, but I 'll leave that to the experts.
The useful bit of advice I can give you is that if you are planning to fly CE and do a quick turnaround you're much better off getting a ticket from SKG, as LGW-SKG I's are lower than similar fares to ATH, the airport is smaller meaning no running to do to catch your flight, the airport charges are lower (this will obviously apply to both of your tix!) and there is no SKG-LHR flight, which makes your life easier if you want to throw your last segment away.