As I have tried to explain before, in the UK the controllers will apply the procedures set out in CAP 493 Manual of Air Traffic Services Part 1 unless there are any other procedures published.
The UK procedures are different from the current ICAO reduced runway separation rules - a sort of hybrid between them and the previous rules. The land after procedure as described in CAP 493 is what is done in practice in the UK. Yes - it's not what ICAO publishes but that is what is done in practice.
Can it be explained any more clearly?
And, for what it's worth, confusing IFR separation with wake turbulence separation and reduced runway separation does not help to understand the situation. Each separation is applied for different reasons and with different conditions.