Royal Welch and Welch
 

These are the only badges I have of my father's
Any idea on what the small one was used for ?

It's a "sweetheart" brooch, worn by wives, girlfriends of soldiers or perhaps worn by an ex-serviceman as a token of his service in the regiment.
Is the wording "Welsh" or "Welch", if the "s" spelling it's pre circa 1922.

It's Welsh Leigh , I never ever noticed before ,you've opened up something new to me here as I have no idea what member of family was in ww1 , the other cap badge is certainly spelt "Welch" so I presume my father was with the royal Welch Fusiliers then with the Welch regiment when joining up with the south walians ..I stand corrected though..thank you for that info on the sweetheart brooch ,that's some excellent info you've passed onto me , many thanks .

I said the spelling changed circa 1922, I should've said 1920.

Thanks Leigh

It's also used as a mufti badge that was worn on the jacket lapel when in civvies.

The Welch/Welch thing has been going on for years, back to and beyond Wellington. The one certainty is that the RWF always preferred "c" and used it for internal purposes even when the Army List, the Colours and the badges used "s".

The CWGC used the official "c" on headstones made after the 1920 change, realised that this was historically wrong, and began the process of replacing worn "c" stones with "s" stones.
Thus cemeteries have both varieties on view.

The small badge is definitely meant to be a veteran’s lapel pin. I often saw that pattern worn by old soldiers at Regimental reunions in the early 1970s. Another version was mounted on a horizontal miniature Lee Enfield.