Decathlon has a couple of 1-2 man tents, Lightent 1 [1.5kg] 80 quid, which I have no experience of [I think it's new in their range], T2 Ultralight Pro [2kg] 100 quid, which I own, several others here do too.
The T2 is great value for the money, a small 2 man tent which is perfect for one really, I've spent a lot of time in that with no issues, no reason to suspect that the other would be any different.
Decathlon cycle all of their tents into sales. I think my T2 was maybe 70 quid, so the 80 quid one would presumably come down to 50 or 60.
So if you have plenty of time to sit and wait for them to get into the sales cycle it's worth having a look at either of those ready to buy when the time is right.