Hi clever b*****ks Garage is renewing cam belt as I don't think it's ever been done (97K). Is there anything else I should ask them to do while they are down there? Water pump stuff?

Hi everyone - is this a TD or TDi engine - I've read loads of stuff about them. This is in a K reg 1992 110 Defender. Is it the engine to have (if it's a TDi)