[UK] Mid range phone to replace Moto X Play

I've been very happy with this phone, unfortunately it has a few wear and tear issues and I need to look for a replacement.

Would prefer something not larger than the MXP (148 x 75 x 10.9 mm / 5.83 x 2.95 x 0.43 in, not overly concerned with the thickness though), and the closer to stock Android the better. Decent battery a plus.

I'd spend up to £300 but I could go a little more to get better build quality.

Thanks!