They are telling you a load of tosh Judith, they do that every year to try and get people to book whilst they are in the mood. The reason is because they have yet to buy more rooms to let.
Guarantee you 100% there will be loooooads of room available in July for Jan 2005.
They did the same with me for Boro this year, earlier in the year they only had a few rooms left, but when i booked in october there were plenty. more commission if you book early!