Thanks Welly. Yes, it's a lovely car - I am loving it! I had to be really careful with the throttle today as it's so effortless in gaining speed. Also, trying to conserve on fuel. I am averaging 33mpg(!) in the 250 miles I've done in it.
The battery is definitely on the way out - barely turned over this morning. It has to be the original, so at least 6 years old. So will be getting that after pay day.
Played around with the radio and, after various adjustments, it sounds a lot better, especially with CDs. Nothing a JBL amp and new speakers/sub won't improve! Copied "Moby" to the internal Jukebox, but annoyingly, it doesn't display any of the CD text

Might need to burn a couple of CDs with mp3's on, properly tagged, and just copy them over. Ordered a Peugeot USB box thing, so I can connect my iPod to it, but implementation of the thing looks very poor indeed.
Some pictures of the car
here.
2003 - 2008: 1998 Peugeot 406 2.1 TD 110bhp LX Saloon
2008 - 2009: 2004 Honda Accord 2.2 CDTI 136bhp Executive Saloon
2009 - 2013: 2002 Peugeot 406 2.0 HDI 110bhp Executive Saloon
2013 - 2021: 2007 Peugeot 407 2.2 HDI 170bhp Executive Saloon (mapped to 213bhp

)
2021 - ????: 2016 Ford Mondeo 2.0 TDCi 180bhp Titanium