Anyone who reads the NOTAMs will know that from time to time trials of GPS jamming occur “officially” in the UK – we had one recently in the Salisbury Plain area.
But did you know that several thousand internet purchased jammers are reported to be in use in UK? The main market for these seems to be truckers who wish to avoid being tracked by their bosses but clearly there are implications for aircraft, particularly at low level. So be sure to maintain your basic navigation skills, using the truly amazing GPS as a secondary aid.