The Cathays Files 25, twelfth edition

This book is non fiction on a british government scandal. Forged documents were made and used by staff in a british university. These criminal activities were arranged by a high level british government official. In 1987 the police confirmed they had the forged documents. They knew who used the documents (two people) and they probably knew who made them. A prosecution should of course start. But no, a prosecution was not started and the government imposed censorship on the situation (giving no explanation). The end of the censorship appears to be imminent. When it ends the government will have to explain it's 1987 decision to block a prosecution and censor the affair. In the book the author states the following question. To the Prime Minister (Mr Starmer), (i) Why was a prosecution not started in 1987 when the police had said they had forged documents? (ii) Why did the government censor this affair (from the 1980s to the date of publication of this book)?