I am sure Gordon will make a big election issue out of how his govt cleared the skies when they open UK airspace again.
Not surprised the airlines took it into their own hands to assess the real danger from the ash as opposed to the theoretical danger - and guess what, no problems found.
If the engines have a reduced TBO because they are flown in low ash concentrations then it will be a small price to pay for getting air traffic moving again - and without compromising safety because the engines were never going to stop in such low concentrations anyway.