Is arbitration possible when one executor and beneficiary are colluding?

[Jesmar]

I am one of two executors and have a beneficiary who is threatening to sue the estate.
I have rejected mediation because it is clear that the beneficiary's offer to mediate is not genuine.
The beneficiary's solicitor also offered arbitration, which I would agree to if the facts can be properly tested, but my co-executor has been colluding with the beneficiary throughout and entirely supports the beneficiary.
Can someone tell me whether arbitration would be possible under such circumstances?

[des8]

Does this relate to your earlier thread?
If so could you repost there as it makes it easier to understand and is more convenient if we have the whole story in one place.
Thanks

[Jesmar]

Thanks DES8. It does not relate directly to the previous thread from April though it is the same problem with executor and beneficiary so I will do as you suggest.