Buck Iron and Buck and Ryan Back Iron. This is a beautiful plane almost certainly made by Slater of London.
The shape of the lever cap and the little "M" at the base of the rear of the plane being common giveaways. Does not have Slater stamped on the plane but Slater frequently supplied them to other companies to sell. The back iron is by Buck and Ryan and the Iron by Buck. The edge has a slight camber, you may wish to make this straight if you want to use as a smoothing iron.
Length is 7 1/2", Width of sole is 2 5/8", Width of Iron is 2 1/4. Please see photos for details of item and condition.