Running

You’re a short run from Greenwich Park. Go there.

^ @dubkev : This, the Greenwich Tritons hill sessions (as @kl, @duncs and I can all attest) around there are brutal but super effective and you have a number of roads where the grades are different to alter how hard it'll be.

hyde vale and crooms hill are good, or point vale if you're a sadist as it's the steepest.

they're all street lit roads and outside the park walls so you can run them at night even if the park is closed.

also I'm in the camp where if you find the session is hard to finish then taking your sweet time on the downhill (walk if you have to) to give yourself time to recover is perfectly fine if it means you can put your best effort into the uphill and complete the session (ditto for track intervals recovery laps).

and if running alone without others to help guide you then knowing what is good form will be important too, watch some videos on yt for tips but basically, shorten your stride, land with your foot under you, try to drive your knees up, if you want to go faster increase your cadence not stride length.