. ▁The ▁contest ant ▁won ▁£ 5 0 ▁for ▁each ▁new ▁word ▁formed , ▁or ▁£ 1 , 0 0 0 ▁for ▁making ▁ 1 0 ▁changes ▁in ▁ 6 0 ▁seconds . ▁ ▁Mer ch and ise ▁A ▁board ▁game ▁based ▁on ▁the ▁series ▁was ▁released ▁by ▁Spe ar ' s ▁Games ▁in ▁ 1 9 9 0 . ▁ ▁Th eme ▁Song ▁L yr ics ▁The ▁theme ▁and ▁lyr ics ▁were ▁created ▁by ▁Mike ▁Mor an . ▁ ▁Take ▁a ▁word ... ▁change ▁a ▁letter ... Do ▁it ▁again ... ▁and ▁you ' ve ▁got ▁a ▁chain ! ▁That ' s ▁how ▁you ▁pla - a - a - ay ▁Ch ain ▁Let ters ! Chain ▁Let ters ! ▁Who a - oa - oa ... ▁here ' s ▁B ead le ! ▁ ▁Trans m issions ▁ ▁Regional ▁transm issions ▁information Chain ▁Let ters '' ▁was ▁one ▁of ▁the ▁first ▁UK ▁game ▁shows ▁to ▁air ▁in ▁the ▁ 9 : 2 5 am ▁slot , ▁the ▁slot ▁was ▁previously ▁used ▁to ▁air ▁the ▁first ▁programme ▁in ▁the ▁I TV ▁School s ▁programming ▁block , ▁which ▁was ▁moved ▁to ▁Channel ▁ 4 . ▁▁ 1 9 8 7 – 8 8 ▁The ▁first ▁series ▁originally ▁a ired ▁on ▁Monday ▁to ▁Friday ▁m orn ings ▁at ▁ 9 : 2 5 am ▁from ▁ 7 ▁September ▁to ▁ 9 ▁October ▁ 1 9 8 7 , ▁the ▁series ▁moved ▁to ▁Monday ▁to ▁Friday ▁af tern o ons ▁at ▁ 1 : 0