I have Moto G and Gplus now for 5/6 years now and it's a great phone. With giffgaff £10 a month bundle. I can change the bundle each month up or down but that £10 includes 3GB data, 500 mins and unlimited texts. If you can ditch the contract SIM I'd highly recommend the Moto/giffgaff combo.
If instant email is important, bear in mind that the Doze functionality, introduced with Android 6 and made much harsher with Android 7, effectively breaks push email in most cases. Lots of websites talk about "exempting" apps from Doze but the exemption is only partial.
Doze is meant to save battery by disabling network access after a while. Whatsapp messages are still received instantly, emails typically aren't. For some people it still works, for others it doesn't, but AFAIK Google has no official explanation on how to make push email work with Doze.
Sadly this is one of those cases of new software breaking old functionality.
In case anyone is searching historical threads on this, I bought three WileyFox phones on the recommendation of Mumsnet users and so far two of the three have had to be returned - there is a known glitch that stops the phone working with the Facebook app if you don't keep on top of the updates immediately. Luckily Amazon have been fantastic about refunds (the second after 5 months). WileyFox customer services never replied to me.
I agree with the Ulefine S8 Pro suggestion or an Elephone. It is a Chinese brand like Ulefone. Readily available on Amazon Prime and you can get one for £100. I have had Ulefone and Elephone phones before. 5 of them on total and no problems whatsoever. I always buy them from Amazon. They are brilliant value for money.