The two letters shown below are templates that you may wish to use. They explain what is happening, raise concerns too & allow you to request being kept in the loop re future changes/plans.
You can get involved even if you do not live in Barnet. The campaign needs those who agree to submit both letters. One will go to Harrow and the other to Barnet.
The aim is to get as many objections as possible to the planning applications.
The relevant website is – better transport