British universities probably have the most expensive fees. However, among the expensive universities in UK, following are quite affordable for international students:

University of Bradford
Liverpool John Moores University
Staffordshire University
Cardiff University
University of Teesside
University of East London

If you look for a college instead of a university, you may save few thousand pound sterling in your tuition fee.

List of Very Cheap Universities in the UK

Bishop Grosseteste University College
Buckinghamshire New University
Canterbury Christ Church University
City College Norwich
Edge Hill University
Glyndwr University
Harper Adams University College
Heythrop College, University of London
Leeds Trinity University College
Liverpool Hope University
Newman University College, Birmingham
Royal Agricultural College, Cirencester
Royal Veterinary College
Scottish Agricultural College
Southampton Solent University
St Mary's University College, Twickenham
Swansea Metropolitan University
The University of Bolton
The University of Northampton
The University of Winchester
UHI Millennium Institute
University College Birmingham
University College Plymouth St Mark & St John
University of Bedfordshire
University of Cumbria
University of Derby
University of Gloucestershire
University of Greenwich
University of Hertfordshire
University of Plymouth
University of Sunderland
University of Teesside
University of Wales, Newport
University of Worcester
Writtle College, Chelmsford

list of cheapest universities in uk