Here is a collection of open data that might be useful material for the hackathon. Of course you are not limited by these sources and may use whatever data you choose.
Please feel free to send us more sources to update this list.
The Police API allows you to retrieve information about neighbourhood areas in all 43 English & Welsh police forces and for the Police Service of Northern Ireland. All forces are required to keep this data accurate and up to date, so the API provides a rich and definitive data source
http://data.police.uk/api/docs/
https://www.gov.uk/government/publications/police-recorded-crime-open-data-tables
http://www.justice.gov.uk/statistics
http://open.justice.gov.uk/
Dept for Transport - Road Accidents, Road safety spend, Residential population by highways authority, Road traffic, Road lengths
http://road-collisions.dft.gov.uk/datasets
There are 76 datasets in this site, divided into six themes: housing, finance, deprivation, wellbeing, business plan and geographical data.
http://opendatacommunities.org/data
The data for each indicator for the 2012 Health Profiles can be downloaded as Excel or CSV.
http://www.apho.org.uk/resource/view.aspx?RID=116446
http://opendata.manchesterdda.com/
http://www.data.ac.uk/ http://ukdataservice.ac.uk/ http://data.gov.uk/
http://www.data.gov.uk/library/home-office-open-data-strategy http://www.data.gov.uk/library/moj-open-data-strategy