clearfinalsno1,
For classes F and G, if your speed is slower than this, then you can fly down to 1500m forward visibility (this referenced by the * and text below the chart), otherwise you must have 5km viz or more.
A vanilla PPL has a vis minima of 3km attached to it. A VFR minima of 1500m only applies if you have CPL, IMC or IR. See the ANO sections for licensing and the Rules of the Air for airspace/VFR constraints.
What applies if your speed is greater than 140kts? This is not stated. Has this been missed off for years/am I the first to query it (unlikely)?
If more than 140kts, the vis stays at 5km but you are subject to 1.5km and 1000' away from cloud constraint.