The General Licence.
Below are the Government links to the information about the General Licence that is full of advice for most pest control issues.
Hi, I am so grateful that you stayed open for me tonight, much later than your regular Thursday closing time. Once again it shows that you are prepared to give a first class service every time. I realise it was not my fault the traffic on the A1 was at a stand still, so I rang you to see if you would wait for me to arrive because after driving 60 miles as I regularly do to you I did not want you to close. It was very much appreciated and I hope your meal was not spoilt.Andrew.