Is a Grant De Bonis Non necessary?

I am dealing with two estates where a husband and wife have died in relatively quick succession.

Mr J died first. His Will appoints Mrs J as his Executor, but failing her, a partner in this firm and another. We applied for the Grant of Probate for Mr J’s estate but, annoyingly, before it was issued, Mrs J died.

Mrs J’s Will initially appoints Mr J as her Executor, but failing him, the same partner in this firm and the same another mentioned above.

We are now applying for the Grant of Probate for Mrs J’s estate. As the Grant was not issued for Mr J’s estate, do we need to apply for a Grant De Bonis Non for Mr’s estate, or does the fact that we apply for the Grant of Probate for Mrs J’s estate, automatically allow the Executors for Mrs J’s estate to administer Mr J’s estate?

If we do apply for a Grant De Bonis Non, can we apply online, or is this an exception?

As always, any guidance is greatly appreciated.

Kind regards.

Martyn Dixon
Harold Bell Infields & Co