The 75mm and 3-inch designs were cancelled before completion but the first T23 was completed and entered trials before the T20 or T22 designs; the second was ready by March 1943.
ðə sˈɛvənti fˈaɪv ˌɛmˈɛm ænd θɹˈiːˈɪntʃ dɪzˈaɪnz wɜː kˈænsəld bᵻfˌoːɹ kəmplˈiːʃən bˌʌt ðə fˈɜːst tˈiː twˈɛnti θɹˈiː wʌz kəmplˈiːɾᵻd ænd ˈɛntɚd tɹˈaɪəlz bᵻfˌoːɹ ðə tˈiː twˈɛnti ɔːɹ tˈiː twˈɛnti tˈuː dɪzˈaɪnz; ðə sˈɛkənd wʌz ɹˈɛdi baɪ mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi θɹˈiː.