Paul wrote:

You are probably right, however in our last house, also by the
seaside, we inherited a monster apple tree with a trunk diameter of
over a foot and span of around 40 feet.

And how did Dwayne know that I have a Cedar 100M away.

Paul,

I think it may be worth checking with Dwayne where he got his info from.
He sounded as though he was possibly in the States rather than the UK,
and that may have relevance to his comments.

Personally, I've never heard about not having apple trees within 2km of
a cedar, but freely admit I've not read everything on the subject

I'm happily growing 4 apples, 1 pear and 1 plum in a windy garden in
N.Wales about 2m (as the crow flies) from the River Dee. Admittedly mine
are (hopefully!) on dwarfing rootstocks, and at only 3 yrs old, are
mostly less than 7 foot tall presently.

Regards,

Sarah