Advice/recommendations needed

I've been told I need to get a copy of my passport certified by my embassy, and then translated to Thai with a certification from the MFA. The translation isn't my concern, but has anyone gotten their passport certified by the British Embassy? It seems like British passports can be certified by local notary companies, but I'm a bit lost and on a time crunch.

Does anyone know the process? And does anyone have any recommendations in the Pattaya/Sattahip area for a notary service?

I stay in Ban Amphur, Near Bang Saray, where TM 30 is filed. For extension, do I go to Jomtien, or is there an immigration office in Sattahip, I'm required to go to.

Just in case there are any other marine-biology-dorks out there:

I stay in Phetchaburi province, where the beach is either flat sand or mud, but I love exploring tide pools! Where is the closest place to Phetchaburi where I could find some tide pools? Obviously I will have to take a road trip!

จะหาแหล่งน้ำที่ใกล้เพชรบุรีได้ที่ไหนบ้าง?