One should remember that reputation and rivalry of any Unit devolved right down to Platoon level in my experience. Each Platoon thinking it was the best in the best Company of the best Battalion. In my Regiment, The Coldstream Guards the Battalions were known as 'Shiny First' and 'Taggy Two', having served in both during my time there was not much between them, indeed the cross transference of Officers and Other Ranks meant that both Battalions maintained the highest standards (IMHO
).
I personally believe that the Regimental system is an essential part of The British Army and long may it be so. Generations of both Officers and Other Ranks have served in the same Regiment and this too adds an essential element to the reputation and efficiency of The Army as a whole.
Simon.