At £400 budget this is the one to go with your grinder.
Rancilio Silvia V4 2014 Edition Espresso Machine @ Incl. Tax: £369.00. (not sure if they improved on the auto filling before steaming and you need to make sure you don’t steam too much at any one go – burn out the steam pump apparently)
I bought my grinder from Bellabarista good service.
From Bellabarista
Otherwise, it’s Gaggia Classic II for around £300++ (sale price £220) the latest version.
Coffeeitalia here
Both reliable
Obviously Sage barista express is fine too if you can stretch your budget.
I have Gaggia Classic as I bought it at a good price many years ago during sale think it was 6 or 7 yrs ago. As I prefer Americano this is perfect for me as I normally drink 2-3 cups per day. I can easily brew 2 to 3 cups of Americano easily when friends visit.
🙂