For the record

In 'Premiership club charges £3,500 to be a mascot' (News, last week), we said that Everton FC requires payment from the families of young supporters who want to be mascots.

This is inaccurate. In fact, the club has two quite different schemes: a traditional match-day mascot scheme and a corporate mascot scheme. The match-day mascot is, and always has been, free; those selected are drawn from the club's supporters' section or are nominated by local charities and children's hospitals. These match-day mascots also get free tickets for the whole family and a tour of the stadium.

The corporate mascot is nominated by a sponsor as part of a luxury package which includes executive seating and hospitality. We are happy to clarify this and offer our apologies for any embarrassment caused.

In the same article, we neglected to say that Tottenham Hotspur offers some free mascot places and mistakenly said that Manchester City charges on some occasions. It does not.

PM-10 stands for particles less than 10 micrometres in diameter - 10 millionths of a metre - rather than 10 millimetres, as stated in 'Chelsea choked by its tractors' (News, last week).

In the profile of Brad Gilbert (7 Days, last week), we said that Gilbert and Andre Agassi's coach/player partnership was matched only by that between Tony Roche and Stefan Edberg. Edberg's coach was, in fact, Tony Pickard.

· It is our policy to correct mistakes as soon as possible. Write to Stephen Pritchard, Readers' Editor, The Observer, 3-7 Herbal Hill, London EC1R 5EJ, tel 020 7713 4656 or email reader@observer.co.uk