I am sorry that I am only answering now, but I rarely sit home at weekends.
What you can see in the pictures is a simple exchange of experiences that is carried out in international units. The British have one of the few regular armies in which the bayonet charge is still used on the battlefield (the last case I remember the Argyll and Sutherland Highlanders Regiment in Iraq in 2004) and they organized this "training". Similarly, Romanians organized demonstrations of their anti-aircraft equipment within the same unit, Poles organize shooting competitions, etc ...
As a curiosity, let me give you the fact that when creating assumptions for a new Polish rifle, British experience convinced the army to develop a bayonet for it (earlier, the resignation of bayonets was considered).