Kent, WA5VJB recently gave a talk on Yagi antenna construction and designs for the UK Microwave Society and it is now on their YouTube page.
This talk should be of interest to anyone interested in building their own Yagi antennas for the VHF and UHF bands.
The talk lasts for about 38 minutes with a short 10 minute Q&A session after it.
WA5VJB also has his own website which has antennas and equipment for the microwave bands here... https://www.wa5vjb.com/index.html