I want to know the answer to the following question:
When did League regulations make Arsenal reduce the seating in Highbury?
All the background I'm provided with is that "This capacity had to be reduced further during Champions League matches to accommodate additional advertising boards, so much so that for two seasons, from 1998 to 2000, Arsenal played Champions League home matches at Wembley, which could house more than 70,000 spectators.". Is that enough to answer the question?
Answer: no