I was in Aldi today I noticed they had some of these tents left. They are advertised as being a 2 man tent with a claimed weight of 1.75Kg, for £49.99 which is a spec for a budget tent. I bought one, more as a possible bike touring tent than for Glastonbury. For the price it appears to be pretty well made, it has aluminum rather than fibreglass poles, and according to my kitchen scales it really does weigh 1.75kg.
It is a low, wedge shaped design - you would struggle to sit upright when getting dressed in it and if there are two people then there isn't much space for much else. Not much of a porch, and no fresh and black technology here.
However, for going to Glastonbury solo and if weight and packed size (its about 50cm long packed) are your priority, and you can cope with the low height, it might be worth a look at the price.
(picture shamelessly stolen from ALDI)
Edit: Nothing to do with me, found a YouTube review here: https://www.youtube.com/watch?v=lXjet5bCeUE