Good question
from the scheme rules: https://www.helptobuy.gov.uk/documents/2015/12/scheme-rules.pdf
“Eligible Interest in Land” means a legal interest in land, solely or jointly owned, and situated within the United Kingdom, as described in paragraphs (a) and ( of the definition of Residential Property Owner.
“Residential Property Owner” means an individual who owns an interest in land, whether in the United Kingdom or elsewhere, which:
(a) is:
(i) in England or Wales:
(a) freehold;
( leasehold, where the lease was originally granted for a term certain exceeding 21 years; or
© commonhold;
or (ii) in Scotland, registered or recorded, or would be capable of being registered or recordered, as a right of absolute ownership in the Land Register of Scotland or General Register of Sasines in Scotland, as applicable;
or (iii) in Northern Ireland: (a) freehold; or ( leasehold, where the lease was originally granted for a term certain exceeding 21 years;
or (iv) an equivalent interest in land to the interests in land listed in paragraphs (a)(i) to (iii) above under the laws of any jurisdiction outside the United Kingdom;
and
( comprises a building that is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use; and
© (i) was acquired by the individual as a purchaser; or (ii) entitles the individual to possession or occupation of that land.
Paragraph (a) above of this definition of “Residential Property Owner” shall be deemed to include an individual who has acquired an interest in land situated within the United Kingdom under the terms of a Regulated Home Purchase Plan.
So i would say no a mooring would not qualify
eta: sorry about all the s - i it took me long enough to format the c&p so i cant be arsed to fix them
oh dear