I've just come across my grandmother's MTC badges and manual of Rules and Regulations, c1942. I see that they had to pay a subscription of 10/6d annually!
Anyway, after all the bits about stockings and make-up, there is a useful section on badges which I copy here, together with my gm's workshop badge. I do also have a collar badge and a certificate of service but I see from another bit of paper that she was supposed to hand back her blue membership card and badges and buttons upon leaving the service. Hope this is of interest if it hasn't been covered already. I must look at that Utube link by postwarden.
Charlie
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