Looking under the bonnet at the front passenger side a vac pipe is loose,part number shows. Bh42 3n226 ab p108, it has a rubber"hooked" piece on top but I cant see where it connects to,anybody know?

Sounds like a front diff or gearbox / transfer breather pipe if it's got a hooked end on it.

LR put them high so when you're wading in water the gearbox / diff / transfer case doesn't suck in water as it rapidly cools the component.

Jon 1992 RR Classic 3.9 efi Vogue
2014 Disco 4 HSE
===================
Both my fatties now gone...
Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus)

Brilliant,thank you for that

Lunch-time and I looked up the part from the ref you gave, it's the breather for the front diff.

Doesn't connect to anything, you should find at least two others as well if you look around the back of the engine above the bellhousing.

The breather just lets the air in the diff expand / contract whilst being high enough not to suck in anything nasty such as water when wading

Jon 1992 RR Classic 3.9 efi Vogue
2014 Disco 4 HSE
===================
Both my fatties now gone...
Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus)

Really appreciate you taking the time out for that,really is appreciated,still getting to know this thing