Professor Ajit Lalvani, a researcher at Imperial College London, says the new blood test, known as enzyme-linked immunospot, or ELISpot, is one and a half times better at spotting tuberculosis carriers.
I wondered why anyone would want to try to relaunch that old TB Elispot test in the face of stiff competition

In Japan it looks as if the war has been completely lost;
In conclusion, the QFT-alone strategy is the most cost effective for tuberculosis contact screening in Japan.
Looking down the PR page I see that in the UK there appears to be considerable financial and political support for Professor Lalvani and an Elispot TB diagnostic other than T-Spot TB
Professor Lalvani leads a new, specially created TB Task Force at Imperial College London and Imperial College Healthcare NHS Trust, who together have formed an Academic Health Science Centre (AHSC). The AHSC aims to bring the benefits of research to patients much more quickly than ever before. The TB Task Force carries out research to develop and deploy effective new weapons in the battle against TB.
This study was funded by the Wellcome Trust; the UNICEF/UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases; and the Sir Halley Stewart Trust.