The invention provides compounds of the formula (I):
or salts, solvates, tautomers or N-oxides thereof, wherein J
1
-J
2
is CH═CH, N═CH, CH═N, HN—C(O) or CH
2
CO; T is N or CH and GP is as defined in the claims. The compounds have activity as inhibitors of PKA and PKB kinases and are useful in the treatment of cancers.