Any fuel leak is too much. It is very dangerous and has to be dealt with. Carry your fire extinguisher.
Depending on what the repair kit was made of the Ethanol in today’s modern gasoline may have degraded it already. There isn’t any good thread sealer that I know of that will do the job. It has to be a good mechanical seal. They only way to know is take the pump out and examine the fittings to see how (and if) they seal.
I hear Moss Motors has a new fuel pump, but it isn’t listed under Sunbeam that I can see. Maybe a Tiger owner has a suggestion?
We will miss you and Dave at the BASH.