Thank you!

It's hard to say, because I'm not exactly sure how the schools will look at online degree programs. In any case, your teaching experience would help.

You might want to read through past application threads for these schools, for example, these are the most recent ones:

https://llm-guide.com/board/uk-ireland/oxford-bcl-mjur-2018-2019-applicants-209940
https://llm-guide.com/board/uk-ireland/cambridge-application-2018-2019-209420
https://llm-guide.com/board/uk-ireland/llm-ucl-kcl-lse-qmul-2018-19-209767

There's a wealth of info in those discussions, about which students got in and which did not. Might be a good place to start. You might also think about also applying to other schools that may not be so competitive, so that you have a 'safety' school lined up, so to speak.