OK, now we are starting to cook on gas. It’s surprising how often people forget to tell us how long they have available to get from A to B and / or by what time they have to be at certain places. It’s also surprising how few people ask, before they start to give ideas.
Do I have this correct:
01 August ferry arrives at Harwich at 06;30
03 August ferry departs Fishguard at ??? - I don’t think you have given us a time.
15 August ferry arrives Holyhead 16:05
18 August ferry departs Harwich 23:00
What time on 03 August does your ferry depart from Fishguard to sail to Ireland?
Two full days (and a little bit) to get from Holyhead back to Harwich, the ferry to Holland departing at 23:00.
Either of the two routes shown in posts #2 and #3 should work. Don’t get distracted by “You must do this, you must do that” across England. The purpose of your holiday is to get to Ireland and ride the Wild Atlantic Way. Things to see and do in England will not go away; come back and see them another time.
Await your words.