Hey I recently got my first pair of Loake shoes as well, so just wanna share.
Yes, you can try it out at Robinson's - but only the big store at Somerset/Orchard would stock Loake. Try to find another pair of shoes made in the Capital last to try. Heard that Metro at Centrepoint also carry Loake but I'm not 100% sure.
Herringshoes and Robinson's Shoes (different from the departmental store) are both highly recommended in this thread. Depending on whether you need the shoes urgently, you might wish to wait for a sale which can go as high as 20% sometimes. Can also look out to see whether the Aldwych appears in the clearance section - that's how I got my Loake Strands for £120.