the Reds management when establishing a TRA were to simply telephone all active airfields within say 15 - 20 miles radius, and state the obvious for promulgation to all airfield members/users
The TRA's promullgated for Red Arrows displays are pushed out by Directorate of Airspace Policy... before publishing an Airspace Cordination Notice, DAP consult with major users in the vacinity... (its a fairly one way consultation, but consultation nevertheless)
Snag is where do they draw the line... Major airfields, Minor airfields, micro-light sites, private strips.... They are quite right to rely on the NOTAM system... and anyone who doesn't check it is quite wrong.
(incidentally... the frequency change missed by the Reds was also NOTAM'd)