Mine was built BW8 (wc 18th Feb) and has only just been confirmed as being on a ship that's currently moored at Sheerness. From there to Grimbsy I've found it takes a day from historic data.
SEAT told me it would take 7/10 working days from docking at Grimbsy to get to dealer, not from Barcelona, so i would take that estimate with a pinch of salt, as its been 3 weeks they did say before it was a 3-4 week trip from build week to destination port.
From taking up a new hobby of ship watching, ( a "gongoozler" according to Google...), i would say your car will be on the Aquarius Ace, as that left Barcelona today.. so fingers crossed!
Sounds like a fun hobby As our "pro gongoozler" do you know how long the trip is from Barcelona to Grimsby?