Many thanks for the input. Is there a definitive view on the main colour being white or red and which monarchs heraldry goes on the flag? The piebald blue-white design appears to be a later nineteenth century device and the more modern red-green a symbol of the revolution. It may well be that the troops had individual regimental colours but the national flag seems elusive. Did the troops just adopt the British flag!??
The start of my sources is GOOGLE but it does not seem to be my friend!