Many thanks for your patience. First of all, I appreciate you are aware of the 2-year rule, but I just need to make it clear that no matter how much good evidence you provide, and even if you prove that you are 100% innocent, the employer can still go ahead and dismiss you. It really depends on what they want to do and if they have made a decision already that they want you out, then they can easily do this, regardless of how strong a case you have and how good your defence is.
If they go into this with an open mind, then you do have a potential chance of avoiding dismissal, but no one can guarantee that.
What you also need to be aware of is that an employee does not need concrete proof of your guilt to make a decision. The law only requires them to conduct a reasonable investigation and following that, form a genuine opinion that you were guilty. Therefore, even without any evidence of your guilt, if they believe the accusers more than they believe you, they can still make a decision against you.
So the employer does not need eye witnesses or CCTV to be able to make a decision – they can go ahead simply by using the witness evidence of the people who made the complaint.
I would say the photos you are going to use showing them happy around you will not really be that relevant – everyone can smile for a photo, even if they do not like the person they are next to, so that will not in itself show the employer anything.
As to CCTV, you have the right to see this, as long as you are in it, by asking the employer to release it under the Data Protection Act 1998. You need to follow a specific procedure for that, but if you are filmed then you have the right to see any footage of yourself.
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