I know this reply is not about interviews with BA, but ....
I had an interview with a Handling Agent at Heathrow. On the day there were 12 of us; there was a brief presentaion, and a simple aptitude test. All the answers to the test were in the presentation, and in the printed handouts given to us. They even told us there would be a test, and where the answers were located.
So, bloke tells us a bit about the company, drops several 'very large' hints about the answer to question 1, and so on.
After 10 minutes, he announces the end of the presentation, and tells us to start of the test - about 15 questions in 20 minutes.
One 'candidate' mumbled loudly "Oh no, I wasn't listening to the presentation".
Oddly enough, he didn't get a job. I've seen him since - he said "would you like fries with that?"

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I thought that the recent crop of BA Ramp Agent vanacies were for temporary contracts?