Hi Tony...after a lot of searching I managed to find that the most active ingrediants of this weedkiller are
This is a non-residual, contact killer
for broadleaf crops
which is also a broad leaf killer.
They all do a first rate job but you must avoid drift or contact with any other plants and also with any pond life.
Do not compost any weeds that you have treated.
It's always a job to treat weeds when they are amongst your good plants but if you are careful...it can be done.
Best to use either a brush or better still a weed-wipe glove.