I managed to get hold of Tamarina sauce after jb told me where he got it locally. I wanted to see if it made a difference. And i wanted to see if i could recreate the same dish again that i so enjoyed. Using the recipe posted above but substituting the East End Tamarind sauce for the Tamarina and upping the chilli to 3 tsps to suit my own tastes here's a few pics of the process along the way and the end result.
Ingredients (omitted the garlic / ginger paste)

Browning the garlic / ginger puree and fresh garlic

In with the diluted tomato paste shortly followed by the spice mix and quenched by 2 chef spoons of base

In went the Tamarina, masala sauce and onions and peppers


Half the gravy added along with the tikka and reduced down

Remaining ingredients added and reduced until desired thickness achieved

the finished result

Ready to be served up

Accompanied by mushroom rice

Ready to tuck in


Last nights efforts the only difference being i reduced the Tamarina to a level dsrt spoon and the chilli to 2 tsp

And served with keema rice - Yum

Was there a difference using the Tamarina? The last two attempts were certainly good. But I thought there was a slight difference, hence my reduction of the Tamarina. This has a higher tamarind concentrate so will add a little more sourness. This however was only marginal. I now intend to use the East End and see if i prefer it. Maybe a very similar taste can be achieved by reducing the Tamarina further. Who knows? But i will enjoy trying ;D