The labs are sending me their ‘last dates for Christmas’ emails currently. To be safe, if you are planning to do any testing, please order asap and make sure you send any samples back to arrive at the labs no later than Weds 17th December. That should ensure your samples are viable and processed before the Christmas break. The labs definitely will not accept anything after the 19th. They then tend to shut until after New Year. This year that probably means Monday 5th January.
Please bear that in mind when ordering this month, thanks.