i'm a bit confused by the original post, dont really know what you mean by how long have you got, if your ticket has expired you cant do gas work, but even if it is expipred what are you asking about a portfolio, as a previously qualified guy you simply go to a centre and do re-assessment, you choose whether you need training, you then wait up to 10 days for the centre to process the paperwork and send it on then wait up to 20 days for the accrediatation body to do their bit and send the paperwork to Gas Safe, shop around and ask how long the place takes to process, bpec are currently saying 8 days at their derby office yo process but they can do it quicker if the candidate is desperate, just ask the the centre to mark "URGENT" on your paperwork