You can put the 2 in the right hand middle box
Can't go in r4c8 given the 7 already in r6c8
Can't go in c9 given you'd then need 7 and 9 to make up the 3 cell cage totalling 18... both are already in box 6
You can then place the remaining 3 numbers in that box and Bob's your uncle. Fairly straightforward from then on
It flowed nicely clockwise from that point.
I did think it was a bit trickier than recent killers based on the bigger cages and lack of easy gimme's, but still easier than say the Sunday Times Superior. I did use more normal Sudoku techniques than is usually required for the killers though. Took me just under 15 mins.