Car been losing small amounts of coolant since I bought it 18 months ago topping it up every 3 weeks or so. I can see small amounts in the troughs at the bottom of the engine on both sides. Assumed its HBV as it was also dripping down back of engine when I did a coolant change with heaters full on
Today after short journey I noticed it was running off the front right hand trough of the engine so cleaned off with tissue but filled up again (car was on level surface) Could see the coolant being disturbed by a drip just back a bit from above its the right hand trough at bottom of engine in picture.

Any idea what this would be Water pump? Core plug? Seems to have been leaking for a while to be a water pump but that is from experience of other cars.
Any help appreciated
Also if it is water pump is it worth getting cam belt done at same time (2 years since last change) or is it only worth doing the other way around, water pump if doing cam belt
Thanks for any help