that being said, i'm talking about noticable, but pretty minor differences in sharpness, the kind of thing that only really comes up as in a big big print, so as everyone says 'the travel tripod you have with you' is better than the rock solid tripod back at home'
just to be on the safe side i'd always take 2 or 3 pictures in case one was slightly blurred from the wind
you can spend £890 on a gitzo than will be steady as a rock, guaranteed- but it won't make your photos any better, so don't go crazy expensive, but then a £20 tripod will likely give you bad shots, you'll end up being ****ed off at it and you'll throw it away, so don't go super cheap either, most of the tripods you'll find at jessops will be cheap, annoying, regretful tripods that are the sole reason that most amateur photographers hate tripods
the travel angel is a good buy- stable, light, folds small and in the future if you want to get a larger tripod for heavier lenses the travel angel will still be good as a small tripod
but whatever you do, if you set your heart on it just find a way to get it, when I bought my vitruvian I really wanted the travel angel, but didn't want to spend the money- but now i've decided that I do want the carbon fibre travel angel still, so unless I sell the vitruvian i'll have lost the money I paid for it! In short, but what you really want or you'll never be happy