I imagine most people who live in an eruv have absolutely no idea whether they live in an eruv or not, including many secular Jews. The London eruvim are massive. If you live in North West London, you probably do.
How will your neighbours know that your DH has Hasidic ancestry? Did he leave that local community or has he got family there?
I can only imagine it might be an issue if you live in an area like Stamford Hill with a very large Charedi community and your neighbours know your DH's heritage. If you live inside an eruv somewhere like Hendon, Hamsptead Garden Suburb, St John's Wood, Elstree, most of your neighbours will not be Jewish, let alone observant Jews or Hasidim.
I've no idea about Manchester but it might be helpful if you specify which eruv so someone can give more specific advice.
I suppose you could visit the house and check out how many of your neighbours have a mezuzah 😂I would say that in London in all likelihood you will have no Jewish neighbours to see you leave the eruv.
Barnet has the highest proportion of Jews in the UK, but even then it is only 15% of the borough. 34% of Jews in the UK are secular and another 30% identify as Liberal, Reform or "traditional but not religious", so even if your neighbours are Jewish, there is a good chance they will be crossing the eruv with you, talking on their mobile while eating a bacon cheeseburger.