1 AC 850 J6 C6 Z3 Y1 M1 U1 B1 /YYC LHR 3 1805 1000+
H0 V0 Q0 L0 A0 K0 N0 I3

2 BA 119 F9 A9 J9 C5 D5 R4 I4 /LHR 4 BLR 1425 0515+
W9 E9 T8 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 G9

1 9W 517 C4 J4 Z4 I4 Y9 M9 T9 /BLR HYD 0610 0710
U9 N9 L9 Q9 S9 K9 H9 V9 O9
or

2 9W3541 Y4 M4 T4 U4 N4 L4 Q4 /BLR HYD 1320 1450
I think for this you would maybe have to go through a TA or try multicity. I will try for you but wanted to post first to show you the availability.

Expensive is that the AC flight only has availability in high booking classes. Still less expensive than LH would chrage you when buying a ticket on day of departure...