Quick update, if anyone is interested; received my new stubby antenna yesterday. Fitted fine, no issues there, looks ok as well. Reception is better in some places, worse in others; for example I now get the local radio station Lincs FM clear as day with no noticable dropout. BBC radio 1 is much the same as before, maybe slightly better, but I could pick up Capital FM before, whereas I can't now. So mixed results really, it's a good buy if there are local radio stations that you listen to but otherwise no better than the OE aerial.