Studio or en-suite room in London/Oxford/Cambridge

Hi, my name is Zoli. Looking for a studio/one-bed flat or an en-suite double room for the long term, only for myself. Either in/around London or Oxford or Cambridge. Both the city and the start date are very flexible.

As I work from home at the moment, and I may switch to hybrid office work soon, the place can be in any of these cities, or around them, but I prefer easy public transport access to London. If it's in London, then I'd prefer it in/around North London, especially in Whetstone or elsewhere in Barnet, but this is not a must.

The start date is also very flexible. It may even be at any time in October, but 1 Nov or later would be easier. Any later start date is also possible, but preferably before the winter. The start date could be any day within a month, so it shouldn't necessarily be the 1st of a month.
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Here are the ideal characteristics of the place I'm looking for, but I'm flexible:

* I don't have a car, so I'd like to get to a bus stop or tube/train station on foot within 10 min.
* The building shouldn't be just right next to a busy road, a railway path, a construction site, or any other place that may produce a lot of air pollution or noise.
* If it's a room then I'd prefer an en-suite.
* I prefer a furnished place, but I may also consider an unfurnished one.
* Wooden floor would be great, also in the bedroom, but not a must.
* I need some space for a desk (ideally at the window) and good wifi (or LAN). I can buy a desk and a chair if you don't have any, I just need some space for them.
* I need a wardrobe in the room for the cloths, ideally a bigger one, and some other storage for smaller items, like a chest of drawers.

I fit into households with people of any ages. Recently I completed a full-time postgrad masters university course, all my groupmates and housemates were in their early 20s, we got along very well. It was a great experience being back in school again. I also get along with senior people very well.

Clean and tidy. An economist, originally from finance and property development, since recently also a medical biotechnologist, now work in the medical business. Often attend conferences on cancer research. Have supported cancer patients and their families. Like being informed about the world, esp. the economy, science and politics. Like travelling in Europe. Like hiking, especially around the Alps. Originally from Budapest, Hungary. Have been living in London for 7 years.