GSS Jims post underlines my point that politicians [even then] were not to be trusted

That all depends if you accept what Jim says in his post as being the truth - simply put it wasn't - at no time at all was permanent partition ever promised by anyone to the Ulster Unionists. please do not just take my word for it:

Look at the details of the proposed but abandoned Amending Bill for the 1914 Home Rule Bill

Look at the details of the Government of Ireland Act 1920 which still mentions a temporary exclusion lasting six years - how could that possibly be if Lloyd George had promised the Unionists permanent Partition in July 1916?

Taking a look at what was said between 1912 an 1914 British Politicians did everything that they said they would

Delivered a Home Rule Act that was delayed due to the outbreak of hostilities in Europe

Delivered on their promise that Home Rule would be the first thing they'd deal with once hostilities had ended

Delivered on the promise that all parties would be consulted.