[1] Born in London and originating from Streatham, Alexander finished third behind Gladys Young in the high jump event at the 1947 WAAA Championships[2][3][4] and second behind Dorothy Tyler at the 1949 WAAA Championships.

[11] She married Michael H. M. Lerwill, from Westerham, on Saturday 31 March 1951 at Holy Redeemer Church[12][13] in Wandsworth.

[14][15] Lerwill broke the world record for women's high jump on 7 July 1951 in London with a jump of 1.72 metres, beating the previous record of 1.71 metres set by Fanny Blankers-Koen of the Netherlands on 30 May 1943 in Amsterdam.

(The record was broken on 22 May 1954 by Aleksandra Chudina of the USSR in Kiev with a jump of 1.73 metres).

This article about an Olympic medallist in athletics of the United Kingdom is a stub.