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From late 2016, Hepatitis A virus (HAV) infection in MSM increased in incidence in the UK and has reached outbreak status. By February 2017, 42 confirmed or suspected cases had been reported in London. An outbreak committee was convened by Public Health England and as part of this work data was gathered to ascertain current levels of vaccination and future needs in MSM attending GUM/HIV clinics.Clinical leads for GUM and HIV services in London were e-mailed a survey asking about past HAV vaccination policy, requirements for vaccine, logistics of vaccine provision, acute HAV infection reporting and contact tracing policy.14/17 (82%) NHS Trusts, representing 23 clinics responded to the survey.4/23 (17%) GUM clinics restarted routine vaccination in 2017. Only 3 HIV clinics were able to estimate background HAV immunity in their MSM as being 70–90% immune/vaccinated. The barriers to roll out of vaccination were identified as cost/funding (17/23 74%); logistics of provision (11/23 48%) and vaccine supply difficulties (7/23 30%). All clinics would contact trace acute HAV cases internally, 6/23 (23%) would notify the Health Protection Team by phone and the rest would notify using the BASHH/PHE notification form.The provision of HAV vaccination for MSM in London GUM clinics has been variable, leading to a significant proportion of MSM potentially remaining non-immune. The main barriers to vaccination have been funding, logistics and vaccine supply. If the outbreak is to be halted, these barriers need to be overcome.