//The OP said 'drink driving', which is spent after 11 years.//
No it isn't.
The "Rehabilitation Period" for all motoring offences which attract an endorsement (but see below) is five years. That's why insurers can only ask you about such convictions for the previous five years. Asking about anything older is illegal. The only time a longer period of rehabilitation would apply is if the driver was disqualified for longer than five years. Then the conviction becomes spent at the end of the disqualification period.
However, driving offences involving excess drugs or alcohol remain active for consideration if a second or subsequent similar offence is committed within ten years of the first. Enhanced minimum mandatory disqualification periods then apply. The endorsement remains on the driver's record for eleven years but that has nothing to do with the rehabilitation period.
Apart from offences which attract custodial sentences of more than four years (which are never spent) the longest rehabilitation period The Rehabilitation of Offenders' Act makes is seven years. That is the period applicable to offences where a custodial sentence of more than thirty months but no more than four years was imposed. All rehabilitation periods mentioned in the Act are reduced by 50% for those convicted when aged under 18.