imtaylor
Regardless of the technicalities of the IMC, please read the visiting pilots pack (PDF link) on the Jersey Aero Club website:
Jersey Aero Club - Destination Jersey
It explains all you need to know about getting there.
As long as you arrive during a quiet time, I am sure ATC will allow you to do an ILS approach even if you fly in as SVFR. They are very friendly and accommodating people.
If you are there for a couple of days, on your full day, go to the club, telephone clearance/ATC Supervisor and ask to do a round the island flight concluding with a radar vectored ILS, missed approach and ILS or VOR procedure to land (about 45 minutes tops). They will tell you if & when it is possible.
Any further enquiries would be best suited talking to the Aero Club by telephone, found on the club web site, the latest local info will be passed onto you.
Enjoy your flight to Jersey and while you are there sign up for the International Air Rally at the end of May.
Happy landings
FB