Sir, – I think the main issue that the Prison Service would face with the nylon multifilament nets that are suggested by Pavel Marianski (Letters, May 6th) is fire. Inmates have a multitude of time and no lack of imagination. Some burning bed-linen or the like aimed correctly would make short shrift of said nets. – Yours, etc,
DÓNAL
CASEY,
Lugarno,
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New South Wales,
Australia.