New images show the next-gen hot hatch during performance testing, and also offer a sneak peek at the interior.

Photographers have snapped the new-generation BMW M135i xDrive doing rounds at the famed Nurburgring circuit in Germany, ahead of an anticipated reveal during the second half of this year.

We've already seen leaked images of the new hot hatch's exterior, though some new photos show more interior details than we've seen previously.

As we expected, the new 1er will draw heavy inspiration from the company's latest models higher up in the range.

The overall cockpit design is very similar to that of the new 3 Series and X5, though a couple of details raise questions.

First of all, the central infotainment system appears to be running iDrive 6 instead of the latest BMW OS7.0 software, through this will likely be changed when the new 1 Series goes into production.

Also, the instrument binnacle appears to have two physical dials on each side of a colour multifunction display – BMW could potentially offer the all-digital 12.3-inch cluster as an option across the range, with top-spec models getting it as standard. We'll see.

The biggest changes for the new 1 Series, however, will be the switch from a rear-drive platform to a version of the front-driven UKL architecture shared with the Mini range and other members in the BMW stable like the X1 and X2.

It will also mark the death of the petrol inline six available on the outgoing M140i performance hero, being swapped out for the high-output 2.0-litre turbo shared with the X2 M35i.

We're anticipating the new 1 Series range will be revealed later this year, potentially at the Frankfurt motor show in September. Stay tuned to CarAdvice for all the latest.