"Owain"
Does he mean producing plans for a Building Regs application, or actually
making the application?

Both I assume.

Actually submitting the application may be your job
or his (it is your responsibility to ensure that it is done, but he should
be in a better position to deal with any queries arising), but it's hardly
time-consuming if he's done all the design and draughting work already. If
he hasn't, he hasn't done his job, and you should consider finding
yourself
an architect who's prepared to do some real work.

Yep great if I lived in a big city, but in the sticks you only the choice of
1.

For a barn conversion you
are going to have to produce full plans and specification, not just for BC
but for the contractors to quote and work from.

No quotes required. Doing it myself.

Thanks for help.