"Boy, it really is me who did this. I'm probably one of the photographers who's created the most work in the history of photography."
He said: "It does worry me - we can be attacked and we are being attacked all the time."Mr Stuart and other bank bosses have been speaking to the Commons Treasury Committee which has been taking evidence on a range of issues affecting the industry, including how vulnerable it is to outages and cyber-attacks.
In March, it emerged- the equivalent of 33 days - of tech outages in the past two years.In recent weeks, retailers Co-op and Marks & Spencer have experienced severe disruption after being targeted by hackers.
Lisa Forte, of the cyber-security company Red Goat, told BBC News that Mr Stuart had made "an incredibly important point"."Cyber-attacks are increasing in both number and severity," she said.
"Criminals are monetising attacks more efficiently, and we are at a point now where it very much is when not if businesses will experience an attack."
Mr Stuart said his banking group was spending hundreds of millions of pounds improving its IT systems.with 175 tests available each week, the average waiting time is the first week when 18 or more appointments are still available to book.
The coming Atlantic hurricane season is expected to be busier than usual, US science agency NOAA has warned, just as cuts to American research are raising fears about the ability to track and prepare for these often deadly storms.Between six and 10 hurricanes are forecast for the Atlantic between June and November, compared with the typical seven.
Warmer sea temperatures – made more likely by climate change - and generally favourable atmospheric conditions, are behind the forecast.Several scientists have told the BBC that widespread firings by President Donald Trump's administration of government researchers could endanger efforts to monitor hurricanes and predict where they might hit.