Cook pasta in lots of boiling salted water until al dente according to packet directions - about 9-11 minutes.
While linguine is cooking, melt butter in a large frypan. Add garlic and saute briefly to release flavor. Add cream; heat just to boiling, stirring frequently. Lower heat and stir in the prawns, parsley, basil and thyme. Continue cooking until the prawns are just heated through. Do not overcook. Remove sauce from heat.
Drain the pasta and toss lightly with the sauce. Toss again with cheese and salt and pepper to taste. Serve immediately.