Company has unilaterally stopped paying its pension contribution.

The trustee has to be an individual.

Not necessarily.

The Employer (i.e. the company) can be the trustee.

Anyone who can sign for the co, eg Director, Co. Secretary can act on behalf of the trustees
 
It was a person - the managing directors wife , I dont even know if she knew she was the trustee as i think he just put her down as it.