Scarlet Patrol.jpgOfficers & Senior NCOs 4th BN, 1904 - Copy (2).jpgOfficers 3rd V.B.,N.F. - pre-1908.jpgS.P.1.jpg
Very much like yourself, although the Northumberlands appear to have adopted vertical bronze collars for the earlier patterns of SD with stand-up collar and trying to find photo's of them wearing 'blue' patrols post-WWI is some thing I have yet to succeed at.
I have photo's of the double breasted blue 'frock' coat - horizontal collars; photo's of the pre-1902 scarlet patrol, with white facings - horizontal collars and even a post-1902 scarlet patrol, gosling green facings in my collection and photo's - horizontal collars, but the 'blue' patrol jacket evades me.
Found a couple of prints of officers of the N.F. wearing 'blue' patrols in 1900 and no collar badges are being worn.