I checked my internet banking account today to make sure a cheque had cashed ok. It had, but apparently the day after I cashed it I also cashed two more cheques for £9500 each
. This mysterious £19k has been sitting in my account now for 4 whole days and I don't know wtf it has come from or who put it there.
What could it be? Banking error maybe? I have no idea how this works but if I transfer it somewhere else before they realise they've made a mistake, will I be able to keep it?

. This mysterious £19k has been sitting in my account now for 4 whole days and I don't know wtf it has come from or who put it there. What could it be? Banking error maybe? I have no idea how this works but if I transfer it somewhere else before they realise they've made a mistake, will I be able to keep it?

I look forward to the "spec me a 15k car and a nice watercooled setup" threads 
), the money will "equal" to where it has been lost.