OK, bit of an update on our situation (Could kick myself).
The Local 5G Mast is going live early may (They are coming back to fit the top section 4th to 6th May)
But I had ordered a CPE PR) Router in anticipation from Ebay, that arrived today, so I set it up to give it a go, and lo and behold it gets a steady signal from the other 5G Tower that is supposed to be out of range.
Getting a superb 320mbps steady download, only 10 to 15mbps but thats fine.. So could have done this over 6 months ago when that tower went in Anyway live and learn at least we have the speed now!!!.
So at the back of the house (Current 4G Tower), speeds seem similar or a bit better than my current 715s which was 50-70mbps down and 25-30 up
now getting 90-110 down and 25-30up
At the Front of the House, was a dead spot with the 715s, max was 10mbps down and 4 to 6 up.. Now getting 320+ down and 10-12up