13-25s make up over 30% of all UK mobile internet users

"The distribution of PC Internet users was found to be relatively equal across each of the age groups studied [Under 25s, 25-34s, 35-44s, 44-55s, 55+s], with approximately one-fifth of the total audience coming from each segment. Mobile Internet usage, on the other hand, skewed substantially younger, with under-25-year-olds accounting for 30 percent of all users. Indeed, this age group represented nearly 50 percent more users than the 45-54 year old (11 percent) and the 55+ year old age groups (10 percent) combined. Mobile Internet users age 35 and under accounted for well over half (56 percent) of total users.
One point of congruency occurred in the 35-44 year old age group, which accounted for a 23 percent share of total users in both the PC and mobile user-bases."
Source: comScore UK PC & Mobile Internet Usage Report, December 2008