There is spark from the coil to the distributor but no spark on to the plugs

Did that, new battery too. New distributor, cap and rotor and plug wires.

Then the spark from coil is not sufficient!!!!!! ... Rotor receives the spark form coil then sends it to the plug wires through the cap... It IS either not enough spark KV or a failed rotor OR cap... New or not!!!.... That's all it CAN be!

Ok thanks and I'll replace the cap and rotor again. Thnx for taking the time to answer my query.

Yep, let me know how you make out...

If the distributor or its componets fail, there would be no spark from the coil..!!!!... Have got spark from the coil..!!!!!

There was strong spark from the coil but no spark on the plugs. As it turned out, I spent 5hrs under the bonnet. Tried new cap and new rotor, new cap old rotor, old cap new rotor, old cap old rotor. Packed tools away and tried one more time - car started!! I think the problem could be the module, but why would it run intermittently? ie: ok when weather is warm and dry, but not when there is rain.

One more time!!... 'IF' you have good hot spark from the coil then forget about everything else in the ignition system EXCEPT : CAP .. ROTOR .. PLUG WIRES .. SPARK PLUGS. Now all that stuff takes care of the secondary ignition system. It also confirms that the primary ignition is operating correctly!... IF you still have starting problems, forget ignition and start looking elsewhere for the trouble!! May need 'hands-on' help from a good mechanic!... Good luck!