The better question is whether the route is real for your family
Several grammar-school areas sit close to one another. A family might look at Kent and Medway, Bexley and Kent, Sutton and Kingston, or Slough and Buckinghamshire. In that situation it is possible for the same child to be registered for more than one test, provided each route allows it and the deadlines are met.
That does not mean every extra route is useful. A second test adds preparation time, test-day pressure, and more decisions after results. It is worth doing only when the schools attached to that route could still be named on the application form after you check travel and admissions rules.
Example
A family in north Kent might consider the Kent Test and the Medway Test. Those are separate selective systems, so the parent should not assume one result covers both areas. The useful check is not “Can we sit both?” but “Are there named schools in both areas that we would actually put on the CAF?”
If the answer is yes, the parent then checks registration dates, test dates, school policies, and the daily journey for the named schools. If the answer is no, a second exam is just extra noise.
What to check before adding another route
- Whether the schools share one test or require separate registration.
- Whether the test date, venue, and any second stage are manageable.
- Whether the route has writing, reasoning, or subject demands that change preparation.
- Whether the school list still works by journey, gender, faith context, and admissions criteria.
- Whether your child would be better served by fewer routes and a calmer plan.
Related routes to compare
Start with the route pages, not the school names in isolation. A shared route such as Bexley, Slough, Sutton SET, Kent, or Medway tells you whether a test is shared, staged, or local to one area.
For a family choosing between routes, the school search and map are often more useful than another broad guide. Open school search or grammar school areas and check the actual schools before registering for an extra exam.