"Dear Joanna I am in receipt of your letter dated 25 th September which arrived in my office on 29 th September advising me that you wished to return to work on 12 th October 1998 after your maternity leave. I must advise you that under theEmployment Rights Act 1996 it is required that you give 21 days notice in writing of your date of return. This requirement has not been met. The date on which the Bank should have received confirmation of your return to work was 21 st September 1998. I therefore regret advise to advise you that I am unable to accept you back on to the permanent staff."