Hi Andy and welcome to the GA forum I see you are fairly new here (just like me!)
You/We have found a super hobby at a time when for reasons I won’t go into there are some big changes taking place as to how the airspace above us is used and controlled for the safety of all! As a result laws have been/are still being written up under the control of the CAA (Civil Aviation Authorities) The 1st part of this has already impacted the Hobby drone flyers myself included in that we have to be tested and registered to ‘Operate’ (be the rightful owner/keeper) and separately as the flyer Good news you’ve done this!
The next stage comes into play 1st July this Yr 2020 which starts a process of change/overlap between present drones on the market and New manufacturing Legal requirements for build standards to assist in how the drones will be able to fly more safely in an ever increasingly busy low level airspace I.e no more that 400ft above ground level (ground to drone straight up vertical measure)
In mid 2022 approx July Even more stringent rules will apply and any aircraft (drone) built and on sale now and up till then unless they carry a ‘category manufacturer marking’ (non available or even built as yet) will need to be flown beyond 150m away from what we would at the moment call a ‘Congested area’I’d hazard a guess by then we hobby flyers will be happy to comply with that as it will save us having to dodge Amazon to name but one of potential dozens of others making drone deliveries
PfCO is Basically a commercial flying Authorisation/Certification Scheme &things are changing for them too!