Can I?
At the moment I live overseas. I will be moving back to somewhere in the UK in the next year or so. Date and location not fixed.
I don't own anything that I'm selling and will likely be a cash buyer. I know roughly what I want in terms of number of bedrooms but struggle to visualize size/layouts when looking on rightmove as I have no frame of reference - I currently live in a small 1 bed terrace and will be wanting a 4 bed detached.
I really need to do a few viewings so that I have a better appreciation of size etc. Am I allowed to? I don't want to waste the time of sellers, but equally how can I look for a house if don't know what I want/need? 
Do I need to lie to estate agents about how proceedable I am?
I will be in Scotland for a week in late May and was hoping to arrange a viewing or two...
Because my return plans are so vague, I can potentially afford either a large beauty of an abode in the North or something I like less, in the south...
Sorry, that turned into a ramble.