Construction you could be alright. Oil and gas is the area thats f@cked mate
I am registered with oilandgasjobsearch.com and the have a sister site constructionjobsearch.com who started sending me emails as the o&g industry is so dry and there seems to be a good few up here
Its nae good in Aberdeen to an extent work wise. I had to f@ck off to Angola as there were no jobs in oil and gas and when the do appear they close within hours due to the shear volume of applicants. But for you i wouldnt be scared of coming back. There is work just not alot in certain sectors