There are some amazing deals over at Olympic currently from both Manchester and London and this one stood out. Leaving from London on 4th August for 7 nights, self catering is £739.06/£184.76pp or even better is half board for just £1071.54/£267.88pp, so for under £10pp per day extra per person you get breakfast and and an evening meal every day which I think is great value for money! There is also a b&b option too.
Flights, 20kg of luggage and transfers are included. I wouldn't hang around if you are after something as these deals will go fast.
There are some Manchester options too, a little more expensive but around 4th and 8th August.
Apartments have good reviews