Ok i can shed a little light on a dark subject
1. With reasonable consultation an employer can change your contract if it is based on implied terms
ie because someone has always worked a certain shift etc the employer can explain why and change it if it still falls within your written contract
The tounge piercing however if the poiicy change is due to Health & Safety reasons which is what most will claim they can enforce that more quickly .
Now your case chop is a little different
You have had a (homo) tounge piercing for quite some time before this rule change .
You need do nothing for the following reasons
If they were to dismiss you i feel that at Tribunal you would have a very good argument in terms of the following
Your tounge piercing has never interferred with your ability to do the job . At no time have you been made aware of any "specific" occasions where you have caused distress to a customer
So therefore you are being "disciplined" by the big bad company for your freedom of speech and a change in corporate policy in terms of dress code
Its worth showing them the Terms and Conditions of your contract and handbook from when you started asking where it shows the tounge stud issue
If you are disciplined etc you need to ask some questions
1. Why now is it inappropriate to have the tounge stud
2. In what way is it affecting your performance at work
3. Raise the issue that you feel victimised and ostricised (spl) by this action
4.Ask about appeals process for any action and MAKE sure you Appeal
5. Ask about grievance procedures in terms of you feel agrieved
If all else fails get rid of it you homo MOFO
Nige