Hi,
You can add the following to your list too:
UK Makers:
Army and Navy CSL
William Moore and Grey
Price
These are older makers not still producing but all made good quality guns.
Of course Webley manufactured 90% of the box lock actions used by the better known London makers.
In South Africa, B. W. Laubscher and Associates have built their first best grade sidelock ejector incorporating the finest lines of the best English makes. Not quite ready to fire yet, but not far off. Bennie Laubscher is the best bolt action rifle maker here and his guns are as good as you will find anywhere.
There are a number of other gun makers here building doubles on Butch Cercie actions.