It was a coincidence. A few weeks earlier there was a fault at the bank's data center. The very expensive backup data center failed to go online. Management was not amused.

Another memory from that time: a stressed sounding trading desk assistant rang me asking after a trade confirmation that went missing and the client was demanding. I determined that the system I worked on didn't handle those kinds of trades. Out of curiosity I looked up the trade. It was for 2 billion GBP of UK Gilts (government bonds), thats about $5 billion USD in today's money.