Figure 1 and 3 plates are in good enough condition for repair. Figure 2 cannot be used for this type of repair. These are worn beyond a point of safety and the door will be in danger of flying open whilst the car is being driven at speed.
I've had success with using J-B weld epoxy. After rough sanding the worn area apply epoxy to plates to Fig 1 and Fig 3. Fill the cavity over flush in Fig 6. After the epoxy is dry file down until flush Fig 7. The epoxy filling is still holding to the plate tooth pattern on my Anglia 124E after a few months with little wear showing at the same time preventing any further wear on the tooth pattern. The filing may one day fall off but I'll just re-apply a new batch.
The Anglia 105E/123E sedan came with two styles of striker plates Fig 8: early type < 10/1962 and Fig 3 later type > 10/1962. Estate later > 6/1963. Fig. 4 are the early types. The L/H plate tooth pattern are solid while the R/H has a hollow front tooth. Fig 5 is the later type all hollow tooth. Be aware of these hollow tooth plates esp. if worn completely through the casting. REPLACE THEM.
Fig 8 are restored early type striker plates with new bumper rubber. Be sure that the door lock striker safety plate is installed p/n: E2093-AA-1 on both early and later striker plates.