WI: Palestine w/ Large (non-Jewish) British Settlement

What if in the short time that Palestine was held by GB under the mandate system, a sizable community of non-Jewish settlers from the Isles developed?
What sort of geo-political effects might this have for the empire 1920 onward?
 
A settler couple in their home.
*plo rockets raining down*
“Dare I say there’s a bit of trouble outside.”
*nearby explosion rattles the windows*
*sips tea*
“Quite.”
 
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