We'll no longer send an email alert when a date stops being available

Until now, we've sent an email alert when a date stops being available as well as when a date becomes available (e.g. you have a search set up for London to San Francisco in Economy, and 1st Feburary 2017 was available, but isn't any more).

This isn't usually very useful, so you'll now only receive an alert when a date becomes available. You can still see full availability from the search results page, linked to in every alert.