Thanks for your question. My name is***** can assist with this.
No, they cannot force it as such, as you have to have the agreement of the joint executors to do this.
However, one executor could make an application to the Court to decide what to do, although for the sums involved here, I expect it would be the last resort as the costs of the application etc. would probably get close to the £10k or so figure that you're taking about.