Apple is upping the ante in its battle with British iOS chipmaker Imagination Technologies by opening a new office “a stone’s throw” from Imagination’s headquarters in St Albans, in the U.K.

This comes days after Apple attacked Imagination for its “inaccurate and misleading” claims. Earlier this year, it was revealed that Apple will be ditching Imagination to develop its own mobile GPUs in-house. Imagination has made clear its belief that Apple can’t design its own GPUs without copying Imagination’s technologies.

Apple has finally hit back at British chipmaker Imagination Technologies for its “inaccurate and misleading” claims.

Imagination, which has been manufacturing graphics chips for iOS devices for the past decade, has been taking stabs at Apple since it revealed the company will be developing its own mobile GPUs. Now Apple is setting the record straight.

Imagination Technologies, the company that has been making graphics chips for Apple’s mobile devices for well over a decade, says it has made no progress in its ongoing dispute with the iPhone maker.

Imagination is still in talks with potential buyers after putting itself up for sale, but it is adamant that it will continue its fight with Apple after the company’s “unsubstantiated claim.”

Imagination Technologies, the British company that has been designing Apple’s mobile GPUs for years, has started a “dispute resolution procedure” with the Cupertino company over a licensing standoff.

Imagination has already confirmed that Apple will be dropping its graphics chips within two years and adopting its own instead. But the company suspects Apple has stolen its intellectual property.