Death at a Funeral marketing based on country

Death at a Funeral had trouble selling in the UK

...it was difficult to sell "Death at
a Funeral" in England, where the genre of "British farce" is more
common and many of the actors in the film are regularly seen on
television, therefore eliminating the ability to market the film as a
unique comedy.

However, the article also states that it has performed well at festivals and has sold well in the US and internationally.

From here