Historically St Bernard's have always taken anyone with the qualifying 111 and upwards, whereas the others have had higher cut off scores.
In previous years though people have not known their scores till after the CAF has to be in. I think that might cause a difference this year, though I couldn't be sure. I imagine many people who might not have considered St B's in the past may put it down as 1st choice (especially as it compares very favourably with the others in terms of GCSE and A Levels despite the lower score usually required) when they know their score to be in the range of 111-116 or 117 say. ( I don't know off the top of my head what the lowest scores for the others were in previous years).
I'm sorry to hear of the 110 score, SloughDad - I'm afraid the only option is to put your GS choice 1st on the form and make an appeal after the 1st of March when you are officially refused a place. Make sure though you put your preferred back up as 2nd, otherwise you might not get allocated that school.
ETA - have a read at the first sticky on this forum viewtopic.php?f=10&t=9313-
historical data on offers. It has some information on prior years cut off. Also harrow has mentioned 3000 sitting the exam this year