On Sun, 20 Sep 2009 18:23:59 GMT, "The Medway Handyman"
had this to say:

The only point I can see is that, if you are over 30cm up you might be able
to see over your fence & intrude on your neighbours privacy. I mention this
when quoting if appropriate and usually get the extra work of installing
trellis :-)

http://www.mrs-trellis.co.uk/

--
Frank Erskine