Guess you are assuming we know what the weather is like in UK and Scandinavia. Not. Except I know from Chris Townsend's articles and posts the Scottish highlands can be extremely windy with few windbreaks and a lot of precip.
Since you probably know about the weather (read relative humidity) where you are going, then if, and only if, condensation is a big issue, I would suggest you carry the extra weight, maybe 1/2 to 3/4 lb., to bring a Scarp or a Rainbow with the liner. Both have been remodeled after much customer input and testing, and will keep the drip-drip-drip off you, and you can sit up without getting your head soaked.
Note that the Scarp has a significantly stronger and less bendy pole than the Moment (the Easton thicker .340 tubing vs. the thinner .344 tubing). Of course, you could always put the heavier Scarp pole on the Moment - they are both the same length - about 10'. The heavier pole will serve a lot better in high winds, with or without guys. And the mostly DWR liner on the Scarp will catch and divert rain that penetrates or 'mists' through the fly.
The extra weight is no more than the water in a liter bottle that is less than half full. It could be a choice between having the water on you, or carrying its weight 'in the bottle.'
If you think the condensation will be not greatly above average, then I agree with Franco, et al., but recommend that you seam seal the single wall tent carefully with at least two applications of well diluted silicone.
That's my two cents, and ultralightheads should know I'm stickin' to it.
Sam in Chocorua NH (where we camp amongst the trees)