[martin]

0800 is a number local to your country. In other words, if I wanted to dial this number from Oz im guessing it would be +44 800.......

As ENUM includes a country code, you should also include this in the ENUM replacement value.

i.e. 44{EXTEN:1}

If you dont care about performing an ENUM lookup, then putting a bogus entry in this field will do the trick. A blank entry means to use the replacement field pattern for ENUM.