Hi, in April of this year my husband received a letter regarding sdp saying he may be entitled from December 2018 to October 2024, he used to claim Incapacity benefit from 1996 and then it changed to ESA, he also claims high rate daily living (pip) , I work but also claim pip and get low rate daily living and high rate mobility, I started to claim this in December 2018, and also claimed child tax and working tax credits due to having my grandson living with us from the age of 5.He is now 19 and still living with us , I did seek advice before filling in the form and they seem to think it’s been overlooked and it’s come to light when I did the migration form from tax credits to universal credit, I’m just wondering how long it will take for them to be in touch with us and should we have been eligible for the couples premium.