ok – so technically he was outside the garden but still… check out this big guy! The photos aren’t great as I didn’t want to get close and he didn’t stick around – he just gave me a ‘look’, poked his tounge out at me and then ran away. Id say he was about a meter long, the size of a medium crocodile!
I worked out what he is…. hes a ‘monitor’ here is a better photo from http://ecologyasia.com/verts/lizards/malayan_water_monitor.htm