Try this
Rye?
Arundel (spelling) ?
Hawkhurst?
Ken.
All no, no & no so far, but Rye has connections 
Whoops! Sorry I must have double clicked 
Clue time
Beyond the arch is a tidal river, and this was a major port 
Bristol ?
lightforce:
Bristol ?
Not Bristol, 8wheels was closest so far, and the connection with Rye should have got it 
Rye Harbour ?
Suedehead:
Rye Harbour ?
Not Rye Harbour, wrong county but close…
How about Hythe…but I am known to be a total idiot 
stuart 0366:
How about Hythe…but I am known to be a total idiot
Not there yet, but could be getting closer (There is more than one Hythe, which one do you mean?)
New Romney
Suedehead:
New Romney
Not New Romney, no river or port there, but close
The only tidal river I can think of in the area is the Stour which would make the port Sandwich (rye connection ) 
Meant Hythe just outside of Folkestone btw
stuart 0366:
The only tidal river I can think of in the area is the Stour which would make the port Sandwich (rye connectionMeant Hythe just outside of Folkestone btw
Spot on Stuart, it is Sandwich
It is the Stour, Sandwich and Rye are both historic Cinque Ports cinqueports.org/
Devious connection also with Rye - rye bread used for sandwich
Dammit I would have got that.
Just beyond the arch is the old toll bridge and further up on the right is the yard where I practised my reversing for my class 1 way back in the 1980s.
The whole area is Pfizers now from what I hear. Ain’t been that way for years.
I used to deliver to
“The Sandwich School”
I know it’s sad but it always made me chuckle.
There is a village very close to Sandwich called “Ham”, one of the finger type road signs between the 2 has fingers pointing to Ham and Sandwich in opposite directions - one day I will stop and take a photgraph