Help - yellow liquid from middle bracket of exhaust?

Mine drips water from said joint always has I put it down to condensation in the exhaust 
But mines clear 
Maybe someone has tried to wash the catalytic converter out with something...... 

I still think it will be dripping from above, however-

assuming that it is coolant, how are you checking that the level isn't going down?

Have you checked the radiator when cold?- it should be full right to the tippy top under the cap, or are you just looking at the expansion bottle?

If there is a leak in the system it won't draw coolant back from the expansion bottle.

The level in the expansion bottle should go up significantly when hot, and then drop back to normal when cold.

 

Hi thanks. Ok I attach a photo of expansion bottle (normal), radiator (full to brim) and bracket where the drip is coming from. I have also taken a photo directly above the bracket - everything is completely dry! Hence the mystery…..

It seems where at the point of random guesses 

​​​​​​Have you used a fuel additive, removed throttle body and looked in the Inlet 
Is air filter deteriorated and pulling partials through 
​​​​​​It's a start 

Thanks! Looks like a referral to a garage and to set out some of these suggestions. Much appreciated 

 Hi. Update is that tonight I found the same liquid directly underneath the radiator- not much, but a drop all the same (see photos). I have taken one photo from the top of the engine bay and you can make out the green liquid on the floor just beyond the radiator . What does this mean? Question is how a leaking radiator is leaving coolant in the exhaust..? I’m not sure that is good news at all? Any advice appreciated!