Search for single-top production in ep collisions at HERA

A search for single-top production, $ep \to etX$, has been performed with 
the ZEUS detector at HERA using 04-07 data for an integrated luminosity of 
277 pb-1. Events from muonic and electronic decay channels of the W boson 
resulting from the decay of the top quark have been sought. The search has 
been made for events with isolated high-energy leptons and high missing 
transverse momentum. No evidence for top production has been found. The 
results have been used to constrain single-top production via flavour 
changing neutral current (FCNC) transitions.