Zakat-ul-Fitr is a charity given to the poor in Ramadan. It is compulsory for every member of a household and must be reach the poor before Eid.
This year the amount is £5.00 per person.
This should not be given to masjids but directly to the poor or a reputable charity.
Some recommended charities are listed below.
African Development Trust
http://www.africandt.org
Interpal
http://www.interpal.org
Nessa Foundation
http://www.nessafoundation.org
Ummah Welfare Trust
http://www.uwt.org