Also, there is no time delay in the live commentary on Manx Radio - you can verify that by listening to the commentary at the Grandstand, Glen Helen or Ramsey Hairpin as what is happening there is on the radio with no delay.

However, the Manx Radio commentary on the Internet may have a delay built in. I expect that somewhere on the IOM is a radio connected to a computer. This is recording what is happening on Manx Radio, and converting it to a digital signal. It then sends it across the internet to the audio streaming supplier who then reconverts the signal and then broadcasts the signal. Listening to BBC Radio 1 on the Internet is about a 20 second time difference to what is really happening - I expect this will be similar.