Chinese Internal Arts Association - my teachers, Karel and Eva Koskuba
Chen Xiao Wang's website - the current head of Chen Style Tai Chi
Chen Yingjun - has details of his seminars when he visits the UK
There's a video of Chen Yingjun performing the Laojia Tai Chi form on Tai Chi Ottowa's Youtube channel
In 2020, Tai Chi was recognised as an "Intangible Cultural Heritage of Humanity" by UNESCO. Here's a video that was produced for the occasion, featurning a number of the top practitioners of Chen Style Tai Chi.
Video of Chen Xiao Wang performing the Laojia form from the rear. The video is not great quality, but it is very useful for following along.