Hi @Johannesvds, I don’t think you’ll have any luck with an eOS build for the BQ Aquaris E4.5, but if there was a build available I think maybe you would be able to flash it directly from ubuntu touch, using twrp.
Not much use to you but just out of interest there was a device request last year for the E4.5, but it’s getting a bit old now. I had the ubuntu edition too but sold it last year.