Thanks.
I've done 600ft cloud base quite recently, but thankfully the cowling inspection lid popped open and I had to return quite hastily. I would have returned anyway - 600ft is not that much fun. I had info it would clear up towards London, but I'm glad I didn't press on to find out.
I fancy an IR now to make my flying better and more useful professionally. But since I'd get most use of airports close to London, i.e. Denham, Esltree, Damyns Hall etc, it's a little annoying that after all the efforts of getting an IR, you still will end up not being able to fly in and use it on really bad days. Meaning that you can't rely on it as a means of transportation.