It appears that I keep being drawn to recipes that combine pork and fennel seeds at the moment.
This slow cooked leg of pork recipe from Able and Co https://www.abelandcole.co.uk/recipes/tuscan-slow-roasted-pork was the one tried on Sunday. 1.75kg leg of pork used with same cooking time. If I do it again I will wrap the lower part in foil. The crackling was prefect, the outside of the meat was crisped just a tad too much.
Might try this one next time: https://www.abelandcole.co.uk/recipes/roast-pork-with-rosemary-fennel-crackling. It's a faster cook time, less time at high temperature.