Has anyone noticed these new gates appearing on the tube system?

Has anyone noticed the additional gates being installed into the Underground network between tube lines at major intersections like Baker Street?

Its clearly a measure being put in place before the introduction of the Night Tube, when ever that happens!  Please see the attached response l got from the Mayors office when l asked about it via written MQT’s. The cost of these gates along with the staff training, new fire alarm systems and control & security systems is a princely sum of £ 1.9 million already for TfL to adapt the Tube system for the new operations !

I would put good money on the 24 hour Tube service not now happening before the end of March.