We are talking about a short hop to the CIs.
It might be a short hop for you from Shoreham. It is 220nm for me, so hardly a short distance.
The airways are the shortest route to Guernsey for me as they are a virtual straight line. Join in the climb to FL100 WCO R41 SAM R41 ORTAC GUR. The same route VFR is a convoluted route around CAS.