That's what it'll be yeah, thanks Mark!
Regarding the delivery options, 1st Class is available for items under the size limit and up to 2kg (see photo below). Once you go over the size limit (forks, 26" rims, etc) or over 2kg then we have to use a courier. Most apply a £25+vat surcharge for islands. We can sometimes use Royal Mail standard parcels which would be ~£10, but can only send those if I go to the Post Office on a Saturday morning, and there is no tracking available.