Completed this successfully after my breathing issues of last time. Still very much a slog to get through and wanting to give up a lot in the later stages.
I know I can do it but damn my body doesnt want to heh. Its all in your head and a test of willpower, currently winning this so yay.
Update on weight, 2 weeks or so and have lost another 4/5 pounds. Down to 19st 8pnd ish (124kg)