Thanks for relating your experience. Wow is it hard to get any concrete figures on questions like "how many takeaways did an average household get per week in 2004". Also pretty tricky to chase down the references from the article you linked.
I found an archived copy of ref ONS2006d "Social trends No.36" here - https://webarchive.nationalarchives.gov.uk/ukgwa/20151014074...
Table 6.2 (p90) says household expenditure on restaurants and hotels went from £167b to $202b between 1991 and 2004.
Table 6.6 (p93) says that households spent an average of £11.60 per week on restaurants and cafes. Not clear if that includes takeaways.
There's an Independent article from 2006 which talks about the study, still not much about takeaways but some interesting nostalgia about the rise of gastropubs: https://www.independent.co.uk/news/business/news/britain-spe...
Mumsnet (to the rescue!) with a thread about takeaway frequencies from kids born 60s-80s. A lot of variation from "only on my birthday" to "every Saturday night": https://www.mumsnet.com/talk/_chat/5031860-did-you-have-many...
I've no doubt that my own childhood was atypical in many respects. Relatively well off, only two kids, dad was a first generation immigrant so perhaps had fewer financial and cultural constraints. When I was a teenager at home from 2000-2006 the data suggests that spending on takeaways and eating out had been surging up to that point.
Either way I will always fondly remember having a donner kebab on a Wednesday evening, sat in the kitchen watching Star Trek Enterprise on the telly on its spinning turntable.
I agree with you about grandparents though. I think the closest mine would ever have gotten was a microwave meal.