If you're only planning on a 60-90 days trip, go ahead and book it if there's a bargain to be had. Worst case scenario is you'll need to apply for an evisa, which is very straightforward.
ahh OK. Pity as it would be useful. But with a long term standard visitor visa at least you'll be able to come and go as you please for the 5 or 10 years. My partner is on a 2 year visa ATM, we will apply for a 5 or 10 year