Tyre has a 'dip' in it after fitting to rim I'm riding with Continental Gatorskin/Hardshell tyres and they are quite tough to get on the rim.  

After attaching the tyre and inflating I notice there is a dip in the tyre at the point where I had to lever it on to the rim.

I've tried deflating and re inflating the tube and trying to adjust the seating of the rim but the dip always seems to be there.

I notice the bump when riding and am a little concerned that at higher speed a little less traction might be an issue.

I'm hoping the tyre will eventually correct itself as it appears to be mishaped following the force required to get it on but might I have permanently damaged the tyre? 

Does anyone have similar experiences or have any solutions? OR maybe this is normal when fitting very tight tyres?!
I used to get this a lot on my old 29er with Continental commuter tyres, large rim with tight tyre made for tough work getting the tyre on and off and often got similar flat-spots.

Check the max psi first but pumping up as hard as possible can ping the tyre beading back on to the rim wall, then deflate back down to your proffered pressure. If its still reluctant you can buy rim lube type stuff (could be a risky Google that, sorry) which is basically washing up liquid, so try that. Add a bit around the tyre wall / beading while its off rim and it will help ping on when you pressure up the tyre.

Track a pump will be your friend here.