Experimental calculator, to calculate ideal starting time from Belford, to arrive at the Holy Island causeway at the optimal tidal point for a foot crossing of the Pilgrim's Way.
Link -> https://mootparadox.com/webapp/pilgrim
Admiralty "Easy Tide"
Interesting to note that the Admiralty low-tide typically shows as approx 25-30 mins before the "midpoint" as calculated from the causeway safe-crossing times.
Northumberland Council Tide Times
Guide to Crossing the Pilgrim's Way
In summary, cross on a receeding tide. Journey takes approximately 90 minutes. Start time should be calculated by subtracting 90-120 minutes from the mid-point of the safe (traffic) crossing times.