Thank you. I'd had in my mind that 2040 was when it approached (effective) EOL, and from the country that had 40 years to plan for the Concorde replacement, I

Thank you. I'd had in my mind that 2040 was when it approached (effective) EOL, and from the country that had 40 years to plan for the Concorde replacement, I was not overly optimistic. Seems there has been a general trend of increasing need to use the barrier, though the 2014 'blip' threw this number upwards. I'm seeing some references to 'it's fine until 2050-2070', but OTOH I'm not seeing a lot of 'we've underestimated global warming effects, so sea level won't be as bad as we thought' stories -- so presumably we should be looking towards the lower end of that 2050-2070 range. I read through the v.interesting link you provided -- it reads very gov.uk. Sadly, after the past couple of years of gov.uk activity I'm not particularly sanguine that they will actually attend to this work.