I would say that there are a couple of downsides in cycling to Dover - mainly crossing London
I may have solved this problem by changing which home I depart from; currently considering the parents' place and a ride along the sahf coast* along NCN2. If nothing else I'd be well practiced with ferries before arriving at Dover. If I decided to get a train down from Birmingham, it wouldn't need multiple changes. Down side: I'd have to go through some place called Brighton
* I noticed I was feeling decidedly less apprehensive about this than the LF1 bit, even though the whole coastal wind thing might be similar. Suspect I might just be scared about touring abroad for the first time. Anyhow, this way I'd get a few days to find my groove first.
Currently also favouring Dover out and Harwich back. There seems to be a well-regarded canal based route from Dunkirk port to Ostend before picking up LF1 proper.
Returning from Harwich...
I've not really explored any of the East at all, by whatever mode of transport. Maybe looping around on NCN 1 and 6 then peeling off around Milton Keynes to somehow link up with known stuff between Long Itchington and Birmingham. MK could also be a bailout point if I felt the urge to hop on a direct London Midland train back to Birmingham.
Has anyone any experience of doing these in touring mode?
NCN 51 Harwich - Colchester
NCN 1 Colchester - Lea Valley
NCN 61 Lea Valley - Welwyn Garden City (looks like it might involve canals)
NCN 57 and 6 Welwyn Garden City - Luton (looks like some off road and an old railway?)
NCN 6 Luton - Milton Keynes
Then I'm not really sure how to tackle the bit from MK to Leamington Spa or Stratford-upon-Avon sort of areas
I don't mind hardpack towpath or railway path, but it would be good to minimise singletrack, mud or anything too too silly.