Running

'Project <40min 10k' is underway in preparation for race at start on June.

8km of 1k intervals at <4min/km with approx 5:20/km rest periods. I honestly don't see how doing this x10 is possible. Hopefully adrenaline will help on the day.
Here's a 3week sub-40 plan you could try:
Training Program towards a sub 40 minute 10K.

You can modify it for a June start - two 3 week blocks with an easy week in between, the first block aiming for a 42 / 43 minute 10k.