As it said in the report you liked to - it is not the first time. Unless you go around being bitten by bats it should not worry you. Most people in this country have probably never even seen a bat let alone got close to one. As for your 'no known cure' it states in the article Defra said the risk to human health of the disease was "negligible" as treatment was highly effective.
The bat may bite another wild animal, the scariest scenario is a load of rabid foxes on the loose. In the final stages an infected host will attack just about anything, it's not known as "Le Rage" for nothing on the continent.