The longest standing rock group from the British Isles that is still performing and that still has all its original band members is U2 (1976-the present)
Dave Phoenix Farrell is the longest longest standing bassist of Linkin Park. He has also played bass for the band The Snax.
Rolling Stones
The longest-standing rock band with no member changes is the American band UFO, formed in 1968. While they have seen several lineup changes throughout their career, the band has maintained the core lineup of founding members Phil Mogg, Andy Parker, and Paul Raymond until his passing in 2019. However, for a band with an unbroken lineup, The Rolling Stones and AC/DC are notable for having retained their founding members for decades, with only minor lineup changes over the years.
flex band
Cal Ripken
baishnikov
There is no Guinness World Records listed specifically for longest time standing, however, St Simeons pole-sitting feat (c AD 521-97) is the longest-standing world record for an individual chronicled. Suresh Joachim holds the Guinness World Record for standing on one leg. He managed this for 76 hours and 40 minutes.
Witness - UK band - was created in 1997.
Witness - UK band - ended in 2004.
Salem - UK band - was created in 1980.
Tempest - UK band - was created in 1974.
Halo - UK band - ended in 2004.