do you mean 5 years?
Nope, 3 months. The requirement for refresher training is at AMC1 FCL.740(b)(1) which also requires the ATO to issue documentary evidence that the required training has been completed that is then to be submitted to the competent authority when applying for the renewal. The CAA has confirmed that if the rating has expired by less than 3 months, when there are no mandatory refresher training requirements, the renewal may be signed by the FE/TRE but after 3 months the rating may be renewed only by the Authority (no doubt for an extra fee).