▪ .... Also, consider filing a flight plan if you plan to
request entry to a CTA/CTR to notify your intentions to an air traffic unit which may
be operating close to its capacity
Really ? Pretty much no CAT around last time I looked at FR24...
There's also huge numbers of controllers furloughed, part of the reason the advice from the DfT came in the first place. Farnborough for example for a lot of today was completely bandboxed, Ground/Tower/LARS W/Zone/Approach ,other units are similar.
Sure ANSPs will need to find staff to cope when we fly in the coming initial weeks, but there is little incentive unfortunately with their own low traffic numbers to have usual levels of controllers with no airport revenue, therefore you may find delays trying to get across a CTR if you plan to cross at the time their 3 movements of the day happen.