She varies between speed - 20% & speed largely depending on what the vehicle in front is doing and if she remembers that it's allowable to overtake cars on the dual or triple carriageways. Drives me nuts.
How in the world is it being a selfish prick to drive safely up to the prevailing speed limit?
If I'm concentrating enough to keep my speed up where appropriate surely those in the overtake lanes who subconsciously slow and then speed up and slow again are the selfish pricks for not getting out the way. I take it you are one of that self righteous klan who believes it's ok to drive endlessly in the overtake lanes & no one should ever over take you.