My Department has not commissioned or evaluated research into the effects on recycling performance of local authority decisions to move away from weekly collections of residual waste. However, of the top 20 highest recycling local authorities in England in 2005-06, 19 were operating an alternate weekly collection scheme for residual waste.
Recent research into kerbside systems in Scotland, by Remade Scotland1, reported that the factors influencing high recovery rates for dry recyclate collections were found to be collection frequency, collection capacity, number of materials collected, and collection frequency of residual waste. One of the findings of the report was that dry recyclate schemes operated in conjunction with a fortnightly residual waste collection produced 65 per cent higher recovery rates than those associated with a weekly residual collection.
1 http://www.remade.org.uk/documents/reports/Kerbside%20 Collection%20-20Factors%20for%20Success_14112Q2570. pdf