▁ 2 9 ▁March . ▁By ▁the ▁end ▁of ▁ 2 0 1 0 , ▁he ▁had ▁called ▁at ▁ 4 0 ▁of ▁Britain ' s ▁ 6 0 ▁race c ourses . ▁In ▁ 2 0 1 1 , ▁K empt on ▁Park , ▁Y arm outh , ▁Tow c ester ▁and ▁Pl um pton ▁will ▁be ▁new ▁add itions ▁to ▁his ▁list , ▁taking ▁the ▁total ▁to ▁forty - four . ▁ ▁Following ▁a ▁decision ▁by ▁the ▁BBC ▁to ▁add ▁a ▁fourth ▁comment ator ▁to ▁their ▁Grand ▁National ▁team , ▁O wen ▁joined ▁Jim ▁Mc Gr ath , ▁Ian ▁Bart lett ▁and ▁Tony ▁O ' He h ir ▁for ▁the ▁ 2 0 0 4 ▁running ▁of ▁the ▁A int ree ▁spect ac ular ▁- ▁taking ▁the ▁field ▁from ▁Valent ine ' s ▁Brook ▁to ▁the ▁M elling ▁Road . ▁He ▁continued ▁in ▁this ▁position ▁until ▁ 2 0 1 0 , ▁when ▁he ▁moved ▁to ▁cover ▁Be cher ' s ▁Brook , ▁F oin av on ▁and ▁the ▁Canal ▁Turn . ▁Since ▁ 2 0 1 3 ▁O wen ▁has ▁comment ated ▁on ▁races ▁over ▁the ▁Grand ▁National ▁course ▁at ▁the ▁Grand ▁National ▁meeting ▁for ▁BBC ▁Radio ▁ 5 ▁Live . ▁ ▁He ▁has ▁also ▁been ▁heard ▁calling ▁at ▁Che p st ow ▁and ▁Hay d ock ▁Park ▁for ▁BBC ▁Television , ▁including ▁the ▁last ▁race ▁to ▁be ▁transm itted ▁from ▁Hay d ock ▁Park ▁by ▁the ▁BBC ▁before ▁coverage ▁switched ▁to ▁rival ▁broad c aster , ▁Channel ▁ 4