There's no harm in being proactive and giving the recruitment department a call. If the post in your area is anything like mine then the letter could have got lost!
If you're not successful on this occasion then it's worth giving it another go in six months.
Before "dickflys" jumps in and tries telling you not to bother, let me say I really enjoy my job so it's worth persevering through the recruitment process.
Good luck!
