I have done Portable Wargame conversions of some of the scenarios for 'Warr Without An Enemie' listed on the Wyre Forest Gamer's website before, but this is one that I haven't previously played. It's an all-cavalry action and it features an early appearence by one Oliver Cromwell. You can read about the actual action, and see the original scenario, HERE.
I ruthlessly simplified it, and rotated the map to allow the road to be portrayed more easily on a square-grid. The primary terrain feature in a large hill on the Royalist side (left). This has a 3 square by 2 square summit, surrounded by a one-square width lower lever, so occupied an area 3 squares by 5 squares. The lower slopes are difficult going. As you can see, I resorted to the traditional 'books under a cloth' approach for this one.
And that was it. It was a quick game and somewhat one-sided. Both sides got good activations early on, then the Royalists kept getting them whilst Parliament didn't. Ideally Parliament might as well stay where they are and let the Royalists come off the hill to them, but why would the Royalists do that? And, historically, Parliament does seem to have taken the initiative in terms of the attack.
I'm not sure how Parliament can win this one.