\acknowledgments{
This work was funded in part by the EU FP7 programme, via the EUDET
infrastructure collaboration. We would like to thank the EUDET
collaboration for their help, organisation and technical support 
during the beam tests. In particular, we are indebted to I.-M.~Gregor
for her assistance and E.~Corrin and his help with the
EUDET software, both during and after the beam period.

We would also like to thank the CERN beam delivery team for providing
reliable and high quality beam throughout the period of our tests.
}
