I find this really odd too, that some people seem genuinely confused about single people having social housing. Why shouldn't they?
Do they think social housing is only for families, and single moms, and people over 65?! 
Several housing associations in my county have built quite a bit of social housing, and have built (in the past 10 years) plenty of houses, and a few bungalows, and some one bed flats. (A few two bed flats too, but more one bed flats,) mostly for single people - but also for couples.
Do some people on here think that all single people should just private rent or buy their own place? Do they not think that single people deserve social housing? Do they not think some single people struggle with only one income? They probably need social housing more than some couples and families. (Although couples and families need it as well of course.)
It is not 'incredibly rare' for a single person to be given a social housing flat. (Not where I live anyway! OR in any neighbouring counties.) Some posters seem to be genuinely offended and annoyed that the OP has a social housing flat? Why? Who should live there if not her? A family with one or two children?! If THAT happened, people would be kicking off about a family with children being shoved into a flat! The vast majority of flats will not suit families with children, so of course it's OK to allocate a flat to a single person.
Surely it makes sense for a single person on one wage (that is not very high, as it is for many people,) to have cheap social housing - as they will be more likely to struggle financially on one income.
I think the people who think single people shouldn't have social housing are the same ones that think social housing is 'free,' and you get all your repairs and maintenance done 'for free!' 😂 Honestly! The level of cluelessness on here from for some people is off the scale.
I also don't need to 'get up to date' on social housing rents - as one poster condescendingly suggested. 🙄 As I said, mine and DH's 2 bed bungalow is less than £400 a month. And most homes (with most social housing landlords) in my area - North Staffs, (and the neighbouring towns and counties,) is £400 to £575 a month. (For most properties.) Some people on Mumsnet may pay £800 to £900 a month for their social housing property, but not everyone does.
So, no, I do not need to 'get up to date' on social housing rents. I AM up to date on them thank you! 😎...