£1000 is quite a lot of money for a run of the mill '
entry level' road bike. That is upper level alloy and entry level carbon bike territory almost.
I was going to suggest having a look at decathlon as well but it seems a lot of their bikes around the £800-1000 price tag is OOS and the Triban 520's have some issues apparently... either with QC or them gluing tyres on to wheels so people cant remove them



(what in the actual f**k...)
Boardman's are kwality if it fits your budget. Trek Domane AL2 or AL3 are also solid choices. anything from Giant's Contend range is also a popular option.
If youre having difficulty sourcing a better bike. Carrera bikes shouldnt be overlooked. I get regularly overtaken by racing snakes bombing around on them in regents park. They are between £300-450 if you decide you want to have money to spend on other things like clothing/accessories etc etc