My landlord has removed a previous shower that was put in before they purchased the property. 

When the contractors began doing the work for the new shower they discovered the previous work appears to have been done by a non-professional without a permit.  In opening up the wall cavity it was discovered that the shower outlet is directly above a standard power point located on the other face of the wall and without any separation between the two.  I am concerned that this is not safe and if the shower outlet leaks, water will cascade down onto the power box and cause a short circuit or fire.

My understanding (and logic suggests) that this is not to code and that the power point would need to be moved to a location further along the wall away from the shower fittings.  If that is the case I assume that until work is done to remedy this situations their insurance will be void.

I want to approach the owners and rental agency to advise them of this but want to be reasonably sure that I am correct and not barking up the wrong tree.  The landlords are really nice people and I am sensitive to the fact that this has cost them much more than they expected already, so I am looking for any alternative to make the arrangement safe and to code for everyone's protection.

Any information and regulations I can refer to regarding this would be helpful.