▁Act ▁ 2 0 0 3 ▁provides ▁that , ▁where ▁a ▁witness ▁is ▁un available , ▁he ars ay ▁is ▁adm iss ible ▁where ▁a ) ▁the ▁relevant ▁person ▁is ▁dead ; ▁b ) ▁the ▁relevant ▁person ▁is ▁un fit ▁to ▁be ▁a ▁witness ▁because ▁of ▁his ▁bod ily ▁or ▁mental ▁condition ; ▁c ) ▁the ▁relevant ▁person ▁is ▁outside ▁the ▁UK ▁and ▁it ▁is ▁not ▁reason ably ▁pract ic able ▁to ▁secure ▁his ▁attend ance ; ▁d ) ▁the ▁relevant ▁person ▁cannot ▁be ▁found ; ▁e ) ▁through ▁fear , ▁the ▁relevant ▁person ▁does ▁not ▁give ▁or al ▁evidence ▁in ▁the ▁proceed ings ▁and ▁the ▁court ▁gives ▁leave ▁for ▁the ▁statement ▁to ▁be ▁given ▁in ▁evidence . ▁ ▁The ▁two ▁main ▁common ▁law ▁exceptions ▁to ▁the ▁rule ▁that ▁he ars ay ▁is ▁in ad miss ible ▁are ▁res ▁gest ae ▁and ▁conf essions . ▁ ▁Canada ▁H ears ay ▁evidence ▁is ▁generally ▁in ad miss ible ▁in ▁Canada ▁unless ▁it ▁falls ▁within ▁one ▁of ▁the ▁established ▁common ▁law ▁exceptions . ▁As ▁a ▁result ▁of ▁the ▁Supreme ▁Court ' s ▁decision ▁in ▁R . ▁v . ▁Khan ▁and ▁subsequent ▁cases , ▁he ars ay ▁evidence ▁that ▁does ▁not ▁fall ▁within ▁the ▁established ▁exceptions ▁can ▁be ▁admitted ▁where ▁established ▁that ▁such ▁evidence ▁is ▁both ▁" necess ary ▁and ▁reliable ". ▁Additionally , ▁he ars ay ▁evidence ▁that ▁would ▁otherwise ▁be ▁adm iss ible ▁as ▁an ▁exception ▁can ▁non eth eless ▁be ▁ex cluded ▁if ▁it ▁is ▁not ▁necessary ▁and ▁reliable , ▁as ▁in ▁R