@Anna ****
when you enter Laos, they will issue a "visa-on-arrival" and it will cost 2000.- THB. There is no way around this, as you cannot do a border run without first having to ENTER Laos. You cannot apply for a transit visa online! And you cannot apply for a transit visa at the Laos border. Laos is only issuing the 30-days tourist visa online, and it costs the same fee! Find on the Laos e-visa website: "eVisa is currently available for Tourist Visa (T-B3) only, the stay permit of eVisa is 30 days after the date of arriving in the Lao PDR." The e-visa for a citizen of the United Kingdom costs 50.- U.S. Dollar! So, it is cheaper to pay the 2000.- THB at the land border