▁Park ▁some ▁functions ▁normally ▁admin ister ed ▁by ▁district ▁or ▁county ▁coun c ils ▁have , ▁since ▁ 1 9 9 7 , ▁fallen ▁under ▁the ▁Ex mo or ▁National ▁Park ▁Author ity , ▁which ▁is ▁known ▁as ▁a ▁‘ single ▁purpose ’ ▁authority , ▁which ▁a ims ▁to ▁" con serve ▁and ▁enh ance ▁the ▁natural ▁beauty , ▁wild life ▁and ▁cultural ▁her itage ▁of ▁the ▁National ▁Park s " ▁and ▁" prom ote ▁opportun ities ▁for ▁the ▁understanding ▁and ▁enjoy ment ▁of ▁the ▁special ▁qual ities ▁of ▁the ▁Park s ▁by ▁the ▁public ", ▁including ▁responsibility ▁for ▁the ▁conservation ▁of ▁the ▁historic ▁environment . ▁ ▁D ul ver ton ▁is ▁the ▁most ▁popul ous ▁area ▁of ▁the ▁elect oral ▁w ard ▁called ▁' D ul ver ton ▁and ▁District '. ▁The ▁w ard ▁st ret ches ▁north ▁from ▁D ul ver ton ▁to ▁W ins ford . ▁The ▁total ▁population ▁of ▁the ▁w ard ▁at ▁the ▁ 2 0 1 1 ▁Census ▁was ▁ 2 , 4 9 1 . ▁ ▁It ▁is ▁also ▁part ▁of ▁the ▁Br id g water ▁and ▁West ▁Som erset ▁county ▁constitu ency ▁represented ▁in ▁the ▁House ▁of ▁Commons ▁of ▁the ▁Parliament ▁of ▁the ▁United ▁Kingdom . ▁It ▁elect s ▁one ▁Member ▁of ▁Parliament ▁( MP ) ▁by ▁the ▁first ▁past ▁the ▁post ▁system ▁of ▁election . ▁ ▁Geography ▁ ▁The ▁town ▁lies ▁in ▁the ▁deep , ▁wood ed ▁valley ▁of ▁the ▁River ▁Bar le , ▁at ▁an ▁ancient ▁route ▁convergence ▁and ▁river ▁crossing . ▁The