Leading on from my thread about my employer wanting to reduce my hours to 2 days/week from 3 - is this ok for a grievance letter? I have no experience of this. I am not a member of a trade union but kept that bit in so they might think "ooo she's in a union we might not be able to screw her over" 
Dear Employer,
Following my email to you on 28th September 2011 which has received no response, I have taken further advice and I am writing to tell you that I wish to raise a grievance.
This action is being considered with regard to the following circumstances: failure to confirm my original job following the end of my maternity leave under the same terms and conditions as before I left (ie. 3 days per week ? Mon/Wed/Sun) equating to pregnancy/maternity discrimination as covered by the Equality Act 2010.
I am entitled to a hearing to discuss this matter; also I am entitled, if I wish, to be accompanied by another work colleague or my trade union representative
Please reply within 14 days of the date of this letter.
Yours sincerely,
weakestlink