Amber engine warning light on and exhaust blowing a little. L322 4.4. Any connection or is the whole thing just F*&^% again?

Anybody know one in South London. L322 will need some spanners used on it in the new year. 2003 V8 petrol. Exhaust blowing. Door lock not working with the key (found this out when I left the lights on) and a service required. Otherwise she's lovely. Any ideas anyone?

Just had the water pump on my 4.4 HSE go this afternoon. Poor thing now outside a London dealers awaiting treatment tomorrow. Anybody got any idea of how much thats going to set me back? 4.4 2003. I'm scared!!!:eek: