I guess you are hoping for direct contact with living relatives.
Other things you can try if not done already:
Frances May Brooks b1910 in 1911 census with her parents and a grandfather
Frances M Brooks = Cyril G Riley 4Q1934 Leicester 7a 532
Any Wiley births recorded in Leicester with mother's maiden name of Brooks, including:
June F Wiley birth registered 3Q1935 7a 247
Ann E Wiley birth registered 3Q1945 7a 283
If you pursue this line then I suggest you get copy birth certificate(s) [which will also give address, occupation etc] and it they look promising then search later records/directories for specific maiden and married name(s) as appropriate.