Mrs 1DC and I both had e passports, Mrs 1DC's never worked but mine did. More often than not when Mrs 1DC's failed she was directed to a real person and got through as quick as i did at the e gate.. I wrote to the passport office to say her's didn't work and was told that if i sent it back to the passport office they would check it and if they decided that it was faulty they would replace it but if they decided it wasn't faulty they would charge me £80. The passports only had 18 months to run to expiry so we decided to wait until renewal. We now have new passports and they both work well.