1990 Strangeways Prison riot April, HM Prison Durham, HM Prison Winchester and HM Prison Wandsworth on 4 April, and HM Young Offenders Institute Glen Parva on 6 April. The weekend of 7 April and 8 April saw protests across the prison system. At HM Prison Leeds there was a sit-down protest after the arrival of over 100 prisoners who had been transferred from Strangeways. At HM Prison Dartmoor, between 100 and 120 prisoners wrecked D wing of the prison, and 12 prisoners also protested on the roof of C wing unfurling a banner that read "Strangeways, we are with you". 32 prisoners from Dartmoor
World Book Day (UK and Ireland) observed on 23 April - it was changed in the UK to avoid clashes with Easter school holidays and with St George's Day. Conversely, a separate event World Book Night organized by independent charity The Reading Agency is held on 23 April. The United Kingdom's own version of World Book Day began in 1998, launched by Prime Minister Tony Blair at the Globe Theatre in London. Several million schoolchildren in the UK were given a special £1 World Book Day Book Token (€1.50 in Ireland) which could be redeemed against any book in any UK bookshop. A specially created WBD