In reply to Rob Parsons:
+1
Being aware is good, but no need to be paranoid about it. I wouldn't at all recommend that everyone bitten by a tick heads to A&E to demand antibiotics as for 90% of the time they aren't needed and (perhaps different for kids as folk tend to be very cautious) mostly they won't give them to you without other symptoms. Even with the symptoms it can be difficult to get treatment!
I've spent a few summers working on highland estates, and most of the Gillies / stalkers don't worry too much about getting ticks, but always kept an eye open for symptoms.
Pretty much everyone I know that's been out walking or climbing for any length of time has had ticks at some point. The advice generally given is look out for bullseye marks around the bite site, or cold/flu symptoms in the days after being bitten. If you have either - go see a doctor, if possible take some info and treatment advice for Lyme Disease with you as a lot of GPs/Docs don't really know anything about it. Some have even been known to claim it doesn't exist in the UK......
Caught early it's generally treatable and short lived. Left late it can be fatal or at least completely debilitating.
A fair bit of debate over the years as to whether you are best to try and delicately remove (giving them time to regurgitate and possibly an increased infection risk) or just pull them out so they have no time to regurgitate and use a pin or similar remove the head to avoid any infection risk (or just leave it - generally they either work their own way out, or the body just breaks them down like any other piece of foreign matter).
Try and get some info on tick hot spots for Lyme Disease too and plan accordingly (might be worth and extra 30 mins walking / pedaling to avoid).
As for avoiding them - it's actually hard in an infected area. They cling to clothing, burrow through wooly socks and fleeces without membranes. I've even had them when I've spent the whole day in water proofs somehow. Limiting exposed skin, and open clothing, avoiding bracken and grassy/tussocky areas where there are deer / livestock helps. As tempting as old shielings / pony huts can be as camp / bivi sites, they are also commonly used by livestock for shelter too so can be localised hot spots. Repellants work to a degree and may stop them climbing onboard, but they are very persistent sometimes. I've had jungle formula on before and watched one craw around looking for somewhere undercoated to bite
They do travel around you as well - so always check areas even if not exposed. Around waist straps seem to be a favorite with me.....
Cheers,
Stuart