That’s 5 journeys from Land’s End to John O’Groats(2), 35 more trips to the seaside(3) or 7 months more driving(4).

(1) Tests results conducted by DEKRA TEST CENTRE at the request of Michelin, in 2014 or 2015 depending on the ranges, gap between average miles for MICHELIN ranges (MICHELIN Energy Saver +, MICHELIN Pilot Sport 4, MICHELIN Primacy 3, MICHELIN Pilot Super Sport, MICHELIN CrossClimate, MICHELIN Latitude Sport 3) and average miles for competitors' tyres: BRIDGESTONE (Ecopia EP150, Potenza S001, Turanza T001, Dueler H/P Sport), CONTINENTAL (ContiEcoContact 5, ContisportContact 5, ContiPremiumContact 5, ContiSportContact 5P AO, ContiSortContact 5 SUV), DUNLOP (Sport BluResponse, Sport Maxx RT, SP QuattroMaxx), GOODYEAR (EfficientGrip Performance, Eagle F1 Asymmetric 2, Vector 4Seasons Gen-2, Eagle F1 Asymmetric SUV), PIRELLI (Cinturato P1 Verde Ecoimpact, P Zero, Cinturato P7 Ecoimpact, P Zero Silver, Cinturato All Season, P Zero Rosso), HANKOOK (Kinergy 4S, Ventus S1 Evo2 SUV), VREDESTEIN (Quatrac 5), NOKIAN (Weatherproof), rounded to the nearest 100 miles. Actual calculated average = 4,977 miles.
(2) Source: Wikipedia.org - Explanation: Land's End to John O'Groats is traditionally considered the longest distance between south west and north east tips of Great Britain. The traditional distance by road is 874 miles (1,407 km) ref: https://en.wikipedia.org/wiki/Land%27s_End_to_John_o%27_Groats. Number of additional journeys calculated as 5000/874 = 5.7.
(3) Source: BBC.co.uk news item and with reference to Ordinance Survey. Church Farm is considered the furthest point from the sea in all of the UK, at a distance of 70 miles, Number of additional journeys calculated as 5000/140 = 35.7 round trips) http://news.bbc.co.uk/1/hi/england/derbyshire/3090539.stm.
(4) ‘7 months more driving’ is calculated using the Michelin 5000 more miles claim plus using data from the Department for Transport Annual Travel Survey Sept 2016 for the UK, where the average UK motorist travels 7900 miles per annum. 5000 more miles at the rate of 658.33 miles per month works out at 7.59 months, rounded down to 7 Months More driving.