Drive there park in the secure car park just before the bridge
Go to Immigration exit Thailand
Jump on the bus takes you across the bridge
Get your Loas visa on the other side enter Loas grab a taxi to Thai Embassy need to be there in morning 9am perfect ( across from the Embassy is Tony a road side office a Loas guy helps fill all the forms out for you photocopys ect ect)
If you need any help
Put all paperwork in
Then pick your passport up the following afternoon
All ways found it busiest on a Monday I go Tuesday or Wednesdays normally