Some stations were halfway through an agreed pay increase which was brought in on two stages, the first part went ahead (2008) but then the recession kicked in, so the second phase was suspended (2009), this lump sum works out at an increase of around 3% i think. They were extremely lucky to get anything this year, more than likely a case of accept it, or get nothing for awhile.
The only downside to the lump sum is that some stations have had their bonus schemes chopped significantly due to the ash cloud. So it could work out that the lump sum will just keep income at the same level as last year for most