The London Embassy will only accept E-visas now so if you want a paper application check online with other city embassy’s ... with London be prepared to have to overcome many small problems... first checkout what documents you need to scan, once scanned each document must be reduced in size to comply (click reduce to web size) and put them in a folder for ease of use when going through the application... it took me hours to get everything in place, but once sorted it went smoothly... after you pay online, click Apply and be patient as everything disappeared and went back to log-in... I thought I had lost it all AGAIN... but later I got an email with the bar code so all was ok.. then just send £10 note postage with your return addressed envelope, the bar coded document and of course your passport... Best of luck to you...