First of all £150 million quid sounds like a lot, but that is less than $0.2B dollars. When we put that into perspective and see the FED PRINTING LITERALLY TRILLIONS OF DOLLARS, this theft of funds is just a ridiculous drop on the bucket.
I dunno. I wouldn't be so grim about it. Frankly, it's a good lot of money, put to a good lot of use, during a good lot of troublesome times. The fact the banks gave it up is kind of curious, imho, because that total amount in their coiffers COULD be used to trade and gather interest. So it is definitely skin of their backs. Even if it doesn't BELONG to them.