If the property is very attractive it will attract a lot of attention and enquiries. Unfortunately some will be from timewasters and day dreamers who have no serious intention of moving, or no ability to pay the price asked. Experienced sellers (and good estate agents) will try to weed out the no-hopers. So it's important to look like a serious contender.
I expect serious contenders viewers to have appointed a lawyer who is all ready to swing into action; (seek personally recommended by trusted person; ask lawyer their terms and fees and to explain the procedure and other legal costs you'll face?. I'd expect the viewer to have contacted a mortgage lender and know how much they can borrow. AIP in place, sure they can afford the price + fees and costs, and to have done some homework on the local area.
Make a tick-box list of wishes (positive and negative).
Before a viewing appt, spend some time exploring the area; have a good look from the street at visible areas of the property (state of roof, chimneys, gutters and downpipes; visible cracks or stains on walls. I take binoculars and a compass. Is there any car parking? on site or in street? double yellow lines? Take a look at the adjacent properties; are they well kept and occupied, or vacant, damaged, gardens full of junk, trampolines and kids toys, or dogs and poo? If there's a back lane, look from there too. What nearby businesses or services might be noisy/smelly attract a lot of traffic noise? (Firestation,commercial kitchens, pub, corner shop/busy junction/school/bus stop/traffic lights, railway line/powerlines .) Some of this basic look-around can be done online via google maps. Take a look at right move sold prices in that street; is the area going up or down; has that property (or it neighbours been sold frequently? If there's a local paper, buy one; look at readers letters to see what residents complain about and any political gripes afoot with local council, planning etc.
When viewing, don't be swayed by anything that either leaves with the seller ( awful furniture, pets, rude inhabitants, mess)- or can be lived with until changed (old decor, carpet, curtains). Look at the lights and wiring (are there lots of sockets? ) and plumbing. look at ALL the ceilings for damp , stains, sags and cracks. Look at the window frame and sills for signs of damp, mould, condensation, mist between double glazing). Listen to your feet for creaky floors and stairs (normal in old house, less so in a new one). How old is the CH boiler? Outside; is thefront/ back garden secure, shared, shady/sunny. Make a mental note of storage; Is there anywhere to stash a pram, bike, suitcases, books, WFH, rubbish, hoover, hobbies,pet.
After the viewing, compare it with your tick box list. If you're interested, tell the agent so and discuss with lender and surveyor.