Thanks for comprehensive reply.
Appears 1851 census index listing 'Annis' is correct. Will follow up on your advice at LDS and order in films for 1851, 1861, 1871 and 1891. May take sometime as I have to travel some distance to their Church and record dept.
As stated found Annis Hayward in 1881 census but no husband nor son Frederick Herbert Hayward but maybe they were out fishing together ,who knows.
His army pension record has him enlisting 1890 and serving overseas 1895-1900 and again prior toand during 1902 and1914-16 so may fluke him in 1891.
Will now check 1901 as you suggested and get back to you if need more assistance. May be awhile. Thanks for all help so far.